SSC CHSL Tier 1 2021 General Intelligence & Reasoning Questions with Solutions

Explanation

The given series follows the pattern of n² + 1, where the base numbers (n) form an arithmetic progression with a common difference of 4.

The terms in the series are calculated as follows: 1² + 1 = 2 5² + 1 = 26 9² + 1 = 82 13² + 1 = 170 17² + 1 = 290 21² + 1 = 442

The sequence of bases is 1, 5, 9, 13, 17, 21. Following this pattern, the missing base number is 9, which gives 9² + 1 = 82.

Explanation

The series follows a pattern where each term is multiplied by 3, and then successive odd numbers starting from 1 are added to obtain the next term.

The step-by-step pattern is: 12 × 3 + 1 = 37 37 × 3 + 3 = 114 114 × 3 + 5 = 347 347 × 3 + 7 = 1048

Following the same logic, the next number in the series is: 1048 × 3 + 9 = 3144 + 9 = 3153

Explanation

The words are coded by rearranging the positions of their letters.

By numbering the positions of the letters in a 7-letter word from 1 to 7: 1 2 3 4 5 6 7

The pattern of rearrangement is to place the last three letters first (5 6 7), followed by the middle letter (4), and then the first three letters (1 2 3). This gives the position pattern: 5 6 7 4 1 2 3

Applying this pattern to the given words:

In INSTEAD: 1: I, 2: N, 3: S, 4: T, 5: E, 6: A, 7: D Rearranging as 5 6 7 4 1 2 3 gives EADTINS.

In ENGLISH: 1: E, 2: N, 3: G, 4: L, 5: I, 6: S, 7: H Rearranging as 5 6 7 4 1 2 3 gives ISHLENG.

Explanation

By decoding the letter symbols as mathematical operators, we get: I represents division (÷) J represents multiplication (×) K represents subtraction (-) L represents addition (+)

Substituting these operators into the given equation: 15 + (3 × 9) - (12 × 2) + (189 ÷ 9) + 29

Applying the BODMAS rule, first solve the operations inside the parentheses: 3 × 9 = 27 12 × 2 = 24 189 ÷ 9 = 21

Substitute these simplified values back into the equation: 15 + 27 - 24 + 21 + 29

Now, perform the remaining addition and subtraction from left to right: 42 - 24 + 21 + 29 = 18 + 21 + 29 = 68

Explanation

The given series can be divided into four groups of five letters each:

Group 1: D _ R X E Group 2: C M R _ E Group 3: _ M R X _ Group 4: A M _ X E

By observing the pattern, each group of five letters ends with the sequence MRXE. The first letter of each group decreases by one position in reverse alphabetical order: D, C, B, A.

Applying this pattern: Group 1 becomes DMRXE (first blank is M) Group 2 becomes CMRXE (second blank is X) Group 3 becomes BMRXE (third blank is B, fourth blank is E) Group 4 becomes AMRXE (fifth blank is R)

The letters required to fill the blanks from left to right are M, X, B, E, R.

Explanation

The series is formed by subtracting 189 from each preceding term. Following this pattern, 1412 minus 189 gives the next number, which is 1223.

Explanation

The logic followed is: (number - 1)³ + number. For the first pair, (4 - 1)³ + 4 = 27 + 4 = 31. For the second pair, (7 - 1)³ + 7 = 216 + 7 = 223. Applying the same logic to the third pair gives (6 - 1)³ + 6 = 125 + 6 = 131.

Explanation

Substituting the sequential mathematical signs ÷, -, +, ×, and = into the given expression:

16 ÷ 4 - 8 + 10 × 2 = 16

Using the BODMAS rule, perform the division and multiplication operations first: 16 ÷ 4 = 4 10 × 2 = 20

Substitute these values back into the equation: 4 - 8 + 20 = 16

Now, perform the addition and subtraction: 24 - 8 = 16 16 = 16

Explanation

By examining the positional values of the letters in each cluster (A = 1, B = 2, ..., Z = 26), a specific pattern emerges for each position across the series.

For the first letter, the positional values decrease by 4: R (18) minus 4 is N (14) N (14) minus 4 is J (10) J (10) minus 4 is F (6) F (6) minus 4 is B (2)

For the second letter, the positional values increase by 7: J (10) plus 7 is Q (17) Q (17) plus 7 is X (24) X (24) plus 7 is 31, which corresponds to E (5) E (5) plus 7 is L (12)

For the third letter, the positional values decrease by 10 (with wrap-around): G (7) minus 10 is W (23) W (23) minus 10 is M (13) M (13) minus 10 is C (3) C (3) minus 10 is S (19)

For the fourth letter, the positional values alternate between Z and M by subtracting 13: Z (26) minus 13 is M (13) M (13) minus 13 (with wrap-around) is Z (26) Z (26) minus 13 is M (13) M (13) minus 13 is Z (26)

Combining these positions gives the missing letter-cluster as JXMZ.

Explanation

The given number series follows an arithmetic progression where each consecutive term is obtained by adding a constant difference of 109 to the preceding term.

318 - 209 = 109 427 - 318 = 109 536 - 427 = 109

Following this pattern, the next term is obtained by adding 109 to 536:

536 + 109 = 645

To verify, adding 109 to 645 gives the subsequent term:

645 + 109 = 754

This confirms the pattern of constant addition.

Explanation

By substituting the signs from option D into the given equation, with the first sign as division (÷), we get:

48 ÷ 6 + 17 × 3 = 12 × 5 - 1

Now, we solve both sides using the BODMAS rule:

Left-Hand Side (LHS): 48 ÷ 6 + 17 × 3 = 8 + (17 × 3) = 8 + 51 = 59

Right-Hand Side (RHS): 12 × 5 - 1 = 60 - 1 = 59

Since LHS = RHS = 59, the mathematical equation is balanced.

Explanation

The correct logical order is based on the astronomical and geographical hierarchy from the largest entity to the smallest entity. The Milky way is the galaxy that contains our Solar System. The Solar System contains the planet Earth. Earth contains the continent of Asia, which in turn contains the country of India. This sequence represents a descending order of size and containment, which corresponds to the sequence 5, 1, 2, 4, 3.

Explanation

The statement "Some rains are cyclones" directly implies its converse, "Some cyclones are rains", because the existential relation is symmetric. Therefore, conclusion I logically follows. No definite negative relationship is established between thunders and cyclones, or between draughts and rains, meaning conclusions II and III do not logically follow from the given premises. Thus, only conclusion I follows.

Explanation

The coding pattern multiplies the alphabetical position of consonants by 2, while the alphabetical position of vowels remains unchanged.

For the word CHILD: C (position 3, consonant): 3 × 2 = 6 H (position 8, consonant): 8 × 2 = 16 I (position 9, vowel): 9 × 1 = 9 L (position 12, consonant): 12 × 2 = 24 D (position 4, consonant): 4 × 2 = 8 Combining these numbers in order gives 6169248.

For the word GUEST: G (position 7, consonant): 7 × 2 = 14 U (position 21, vowel): 21 × 1 = 21 E (position 5, vowel): 5 × 1 = 5 S (position 19, consonant): 19 × 2 = 38 T (position 20, consonant): 20 × 2 = 40 Combining these numbers in order gives 142153840.

Applying this same rule to the word BOOK: B (position 2, consonant): 2 × 2 = 4 O (position 15, vowel): 15 × 1 = 15 O (position 15, vowel): 15 × 1 = 15 K (position 11, consonant): 11 × 2 = 22 Combining these numbers in order gives 4151522.

Explanation

The relation between the numbers follows the pattern: n : n³ + n²

Applying this pattern to the first two pairs: 4 : 4³ + 4² = 64 + 16 = 80 7 : 7³ + 7² = 343 + 49 = 392

Applying the same pattern to the fifth number: 5 : 5³ + 5² = 125 + 25 = 150

Explanation

The series follows a specific pattern of subtraction by 3 for each position of the letter in alphabetical order where A = 1, B = 2, ..., Z = 26.

For the first letter of each cluster: Y (25) - 3 = V (22) V (22) - 3 = S (19) S (19) - 3 = P (16) P (16) - 3 = M (13)

For the second letter of each cluster: X (24) - 3 = U (21) U (21) - 3 = R (18) R (18) - 3 = O (15) O (15) - 3 = L (12)

For the third letter of each cluster: Z (26) - 3 = W (23) W (23) - 3 = T (20) T (20) - 3 = Q (17) Q (17) - 3 = N (14)

Combining these letters results in the cluster MLN.

Explanation

The given number series follows an alternating mathematical pattern of multiplication and subtraction with consecutively increasing integers:

First transition: 4 × 2 = 8 Second transition: 8 - 3 = 5 Third transition: 5 × 4 = 20 Fourth transition: 20 - 5 = 15 Fifth transition: 15 × 6 = 90

Applying the third transition, the missing number is 5 × 4 = 20.

Explanation

The coding pattern divides the seven-letter word into three parts: the first three letters, the middle letter, and the last three letters.

The first three letters are reversed in position. The middle letter remains in its original fourth position. The last three letters are reversed in position.

For GREATLY, GRE becomes ERG, A remains A, and LTY becomes YLT, resulting in ERGAYLT.

Applying this pattern to TROUBLE: The first three letters TRO are reversed to ORT. The middle letter U remains in its position. The last three letters BLE are reversed to ELB.

Combining these segments yields ORTUELB.

Explanation

The series is formed by two independent patterns: one for the first two letters and another for the last two letters of each cluster.

For the first two letters: The letters alternate between NH and HN in each successive term. 1st term: NH 2nd term: HN 3rd term: NH 4th term: HN 5th term: NH

For the third and fourth letters: Both letters increase by 2 positions in the alphabetical order with each step.

Third letter: M (13) + 2 = O (15) O (15) + 2 = Q (17) Q (17) + 2 = S (19) S (19) + 2 = U (21)

Fourth letter: S (19) + 2 = U (21) U (21) + 2 = W (23) W (23) + 2 = Y (25) Y (25) + 2 = A (27 or 1)

Combining these patterns, the missing letter-cluster is NHQW.

Explanation

According to the first statement, all towels are cloths, meaning the set of towels is entirely contained within the set of cloths.

The second statement states that no cloth is a blanket, which means the set of cloths and the set of blankets are completely disjoint.

Since all towels are inside the set of cloths, and the set of cloths has no intersection with the set of blankets, it is impossible for any towel to be a blanket. Therefore, no towel is a blanket, which means conclusion III logically follows.

Explanation

Applying the mathematical operators in option C to the given equation, we replace the asterisks sequentially with +, ×, =, and +:

43 + 11 × 4 = 71 + 16

According to the order of operations, we perform the multiplication on the left-hand side first:

11 × 4 = 44

Substituting this back into the left-hand side gives:

43 + 44 = 87

Now, calculating the right-hand side:

71 + 16 = 87

Since both sides simplify to 87, the equation is perfectly balanced.

Explanation

By replacing the asterisks in the equation sequentially with the mathematical signs minus, division, plus, multiplication, and equals, we get:

57 - 35 ÷ 7 + 14 × 2 = 80

Applying the BODMAS rule:

First, perform the division operation: 35 ÷ 7 = 5 The equation becomes: 57 - 5 + 14 × 2 = 80

Next, perform the multiplication operation: 14 × 2 = 28 The equation becomes: 57 - 5 + 28 = 80

Finally, perform the addition and subtraction operations: 52 + 28 = 80 80 = 80

This balances the equation.

Explanation

In all the given number-pairs except B, the first number is greater than the second number: 16 > 8 9 > 6 36 > 9 But in the pair 4:5, the first number is smaller than the second number (4 < 5).

Additionally, in all other pairs, the two numbers are not co-prime as they share a common factor greater than 1: The highest common factor (HCF) of 16 and 8 is 8. The HCF of 9 and 6 is 3. The HCF of 36 and 9 is 9. But in the pair 4:5, the numbers are co-prime with an HCF of 1.

Explanation

To arrange the words in alphabetical order as they would appear in an English dictionary, compare them letter by letter from left to right.

Comparing the second letter of each word, the words beginning with Re (Resolve, Resonant, Return, Respond) come first, followed by Ri (Rigidity), and then Ro (Rodent). This establishes that Rigidity (6) and Rodent (2) must be the final two words in the sequence.

Now, compare the four words starting with Re. Looking at their fourth letters, s comes before t, meaning Resolve, Resonant, and Respond all come before Return (4).

To order Resolve, Resonant, and Respond, compare their fifth letters: l comes before n, and n comes before p. This gives the sequence Resolve (1), Resonant (3), and Respond (5).

Combining these arrangements, the complete correct dictionary order is Resolve (1), Resonant (3), Respond (5), Return (4), Rigidity (6), and Rodent (2), represented by the sequence 1, 3, 5, 4, 6, 2.

Explanation

In the given number pairs, the relationship between the first number, n, and the second number is defined by the formula (n + 1)². For the pair 41:1765, applying this formula yields (41 + 1)² = 42² = 1764. Since the second number in this pair is 1765 instead of 1764, it does not conform to the established pattern followed by the other pairs, making it the odd one out.

Explanation

The differences between consecutive terms of the given series are calculated as follows:

25 - 13 = 12 38 - 25 = 13 62 - 38 = 24 88 - 62 = 26 124 - 88 = 36 163 - 124 = 39 211 - 163 = 48

The sequence of differences is 12, 13, 24, 26, 36, 39, 48, ... which is formed by alternating multiples of 12 and 13:

12 × 1 = 12 13 × 1 = 13 12 × 2 = 24 13 × 2 = 26 12 × 3 = 36 13 × 3 = 39 12 × 4 = 48

Following this pattern, the next difference must be the fourth multiple of 13:

13 × 4 = 52

Adding this difference to the last term of the series gives the next number:

211 + 52 = 263

Explanation

The relationship between the terms in each pair follows the pattern where the second term is equal to the square of the first term plus 9.

Using the first pair: 7² + 9 = 49 + 9 = 58

Using the third pair: 12² + 9 = 144 + 9 = 153

Applying the same logic to the middle pair, let the missing term be x: x² + 9 = 370 x² = 361 x = √361 = 19

Explanation

The relation between the terms follows the pattern where the first number is multiplied by itself minus 3.

x : x × (x - 3)

For the first pair: 13 : 13 × (13 - 3) = 13 × 10 = 130

For the second pair: 15 : 15 × (15 - 3) = 15 × 12 = 180

Applying the same logic to the third pair: 27 : 27 × (27 - 3) = 27 × 24 = 648

Explanation

The relationship between the terms in each pair is that the second term is 5 times the first term.

For the first pair: 64 × 5 = 320

For the third pair: 22 × 5 = 110

Applying this same logic to the middle pair, where the second term of the pair is 70, we find the first term of the pair: 70 ÷ 5 = 14

Explanation

The coding pattern involves reversing the order of the letters in the word and then shifting each letter backward by one position in the alphabetical order (subtracting 1 from its position).

Applying this pattern to RAIN: The reverse of RAIN is NIAR. Subtracting 1 from each letter: N - 1 = M I - 1 = H A - 1 = Z R - 1 = Q This gives MHZQ.

Applying this pattern to COAT: The reverse of COAT is TAOC. Subtracting 1 from each letter: T - 1 = S A - 1 = Z O - 1 = N C - 1 = B This gives SZNB.

Applying the same pattern to ROLE: The reverse of ROLE is ELOR. Subtracting 1 from each letter: E - 1 = D L - 1 = K O - 1 = N R - 1 = Q This gives DKNQ.

Explanation

Each letter of the word is coded by replacing it with its preceding letter in the alphabetical series, which is a decrement of 1 from its alphabetical position, with A wrapping around to Z.

Applying this pattern to TABLA: T - 1 = S A - 1 = Z B - 1 = A L - 1 = K A - 1 = Z

This transformation results in the coded word SZAKZ.

Explanation

We can decode the statement from the end: My mother's daughter is Rahul's sister. The father of Rahul's sister is Rahul's father. According to the statement, the pointed person's son's son is Rahul's father. Since the person's grandson (son's son) is Rahul's father, the person is the grandfather of Rahul's father. The grandfather of one's father is their great-grandfather.

Explanation

The given series is an alternating series consisting of two separate arithmetic progressions.

The first sequence consists of the terms at even positions (1st, 3rd, 5th, 7th terms): 176, 228, 280, 332... Here, each subsequent term is obtained by adding 52 to the previous term: 176 + 52 = 228 228 + 52 = 280 280 + 52 = 332

The second sequence consists of the terms at odd positions (2nd, 4th, 6th, 8th terms): 218, 291, 364, ? Here, each subsequent term is obtained by adding 73 to the previous term: 218 + 73 = 291 291 + 73 = 364

To find the missing 8th term, we add 73 to the 6th term: 364 + 73 = 437

Explanation

The mathematical relation followed in the other pairs is that the first number is equal to the square of the second number minus 1. This is expressed by the formula:

First number = (Second number)² - 1

For the pair 25:8, applying this formula gives:

8² - 1 = 64 - 1 = 63

Since 63 is not equal to 25, this pair does not follow the established relation and is the odd one out.

Explanation

The series is formed by shifting each letter of a cluster backward by three positions in the English alphabetical order to get the corresponding letter of the next cluster.

First letter: E minus 3 is B, B minus 3 is Y, Y minus 3 is V, and V minus 3 is S. Second letter: M minus 3 is J, J minus 3 is G, G minus 3 is D, and D minus 3 is A. Third letter: X minus 3 is U, U minus 3 is R, R minus 3 is O, and O minus 3 is L. Fourth letter: B minus 3 is Y, Y minus 3 is V, V minus 3 is S, and S minus 3 is P.

Applying this pattern of subtracting 3 to the letters of the first term EMXB results in the cluster BJUY.

Explanation

Substituting the mathematical signs from option B in place of the asterisks in the equation: 24 × 6 - 51 = 31 × 3

Evaluating the left-hand side (LHS) using BODMAS rules: 24 × 6 - 51 = 144 - 51 = 93

Evaluating the right-hand side (RHS): 31 × 3 = 93

Since both the left-hand side and the right-hand side equal 93, the equation is perfectly balanced.

Explanation

To find the relationship, the statement can be broken down from the end:

Rohan's wife's daughter is Rohan's own daughter. The brother of Rohan's daughter is Rohan's son. According to the statement, the woman's daughter's son is Rohan's son. For the woman's daughter's son to be Rohan's son, the woman's daughter must be Rohan's wife. Therefore, the woman is the mother of Rohan's wife, which makes her Rohan's mother-in-law.

Explanation

The pattern followed in the given pairs is that the second number is obtained by multiplying the first number by the sum of itself and 2.

The mathematical formula for this relation is: y = x × (x + 2)

Applying this formula to the first pair: 5 × (5 + 2) = 5 × 7 = 35

Applying this formula to the third pair: 14 × (14 + 2) = 14 × 16 = 224

Applying the same formula to the second pair with x = 9: 9 × (9 + 2) = 9 × 11 = 99

Explanation

To arrange the words in alphabetical order as they appear in a dictionary, compare them letter by letter:

First, compare the second letter of each word. Kitchen, Kinship, Kinetic, and Kind have i as their second letter, while Knight has n. Since i comes before n, Knight (1) will be placed last in the sequence.

Next, compare the third letter of the remaining words. Kitchen has t, while Kinship, Kinetic, and Kind have n. Since n comes before t, Kitchen (2) will be placed after the other three.

Finally, compare the fourth letter of Kind, Kinetic, and Kinship: Kind has d. Kinetic has e. Kinship has s.

Since d comes before e, and e comes before s, the correct alphabetical sequence for these three is Kind (5), Kinetic (4), Kinship (3).

Combining the segments gives the complete alphabetical order: Kind (5), Kinetic (4), Kinship (3), Kitchen (2), Knight (1), which corresponds to the sequence 5, 4, 3, 2, 1.

Explanation

The relationship between the numbers follows the pattern where the second number is calculated from the first number x using the formula x² + 3x + 1.

Applying this rule to the first pair where x = 7: 7² + 3(7) + 1 = 49 + 21 + 1 = 71

Applying this rule to the second pair where x = 13: 13² + 3(13) + 1 = 169 + 39 + 1 = 209

Applying the same rule to the third pair where x = 16: 16² + 3(16) + 1 = 256 + 48 + 1 = 305

Explanation

Correct Answer: D

The coding pattern follows the rule where the alphabetical positions of the letters of each word are summed up and then multiplied by 2.

Using the standard alphabetical positions A = 1, B = 2, ..., Z = 26:

For NOPE: N = 14, O = 15, P = 16, E = 5 Sum = 14 + 15 + 16 + 5 = 50 Code = 50 × 2 = 100

For EGG: E = 5, G = 7, G = 7 Sum = 5 + 7 + 7 = 19 Code = 19 × 2 = 38

Following the same logic for LAP: L = 12, A = 1, P = 16 Sum = 12 + 1 + 16 = 29 Code = 29 × 2 = 58

Explanation

Correct Answer: B

The coding scheme is based on the alphabetical positions of the letters. Consonants have their alphabetical position multiplied by 2, while vowels retain their original alphabetical position.

For STATE: S is a consonant with position 19, so 19 × 2 = 38 T is a consonant with position 20, so 20 × 2 = 40 A is a vowel with position 1, so 1 × 1 = 1 T is a consonant with position 20, so 20 × 2 = 40 E is a vowel with position 5, so 5 × 1 = 5 Combining these gives 38401405.

For EXILE: E is a vowel with position 5, so 5 × 1 = 5 X is a consonant with position 24, so 24 × 2 = 48 I is a vowel with position 9, so 9 × 1 = 9 L is a consonant with position 12, so 12 × 2 = 24 E is a vowel with position 5, so 5 × 1 = 5 Combining these gives 5489245.

Applying this logic to ARENA: A is a vowel with position 1, so 1 × 1 = 1 R is a consonant with position 18, so 18 × 2 = 36 E is a vowel with position 5, so 5 × 1 = 5 N is a consonant with position 14, so 14 × 2 = 28 A is a vowel with position 1, so 1 × 1 = 1 Combining these gives 1365281.

Explanation

The relationship is established by dividing each eight-letter word into two equal halves of four letters each, and then swapping their positions.

In BIRTHDAY, the first half is BIRT and the second half is HDAY. Swapping these two halves results in HDAYBIRT.

In CHILDREN, the first half is CHIL and the second half is DREN. Swapping these two halves results in DRENCHIL.

Applying the same pattern to PROGRESS, the first half is PROG and the second half is RESS. Swapping these two halves results in RESSPROG.

Explanation

The relation between the classes can be understood using set theory. Let Hut, House, and Villa represent the respective sets.

According to the first statement, all huts are houses, which means the set of huts is a subset of the set of houses.

According to the second statement, no villa is a house, which means the set of villas and the set of houses are completely disjoint and have no elements in common.

Since the set of huts is entirely contained within the set of houses, and the set of houses has no overlap with the set of villas, it directly follows that the set of huts can have no overlap with the set of villas. Thus, no hut is a villa, making conclusion III logically valid.

Explanation

The difference between consecutive terms in the series follows a specific pattern of alternating additions of cubes and subtractions of squares of consecutive natural numbers.

Let dₙ represent the difference between the (n+1)-th term and the n-th term.

The first difference is: d₁ = 16 - 5 = 11

The subsequent differences are calculated as follows: d₂ = d₁ + 1³ = 11 + 1 = 12 d₃ = d₂ - 2² = 12 - 4 = 8 d₄ = d₃ + 3³ = 8 + 27 = 35 d₅ = d₄ - 4² = 35 - 16 = 19 d₆ = d₅ + 5³ = 19 + 125 = 144 d₇ = d₆ - 6² = 144 - 36 = 108 d₈ = d₇ + 7³ = 108 + 343 = 451

Applying the next difference to the last term: 342 + d₈ = 342 + 451 = 793

Explanation

Applying the operators sequentially to the equation:

16 ÷ 2 × 4 – 8 + 10 = 34

Using the BODMAS rule, perform the division first: 16 ÷ 2 = 8

Next, perform the multiplication: 8 × 4 = 32

Then, carry out the addition and subtraction: 32 – 8 + 10 = 24 + 10 = 34

The calculation yields 34, which balances the equation.

Explanation

By sequentially placing the letters of the correct option into the blanks, the series is completed as:

t u u x v x y u u t x v y x u y v x x u

We can divide this completed 20-letter sequence into 4 groups of 5 letters each:

t u u x v / x y u u t / x v y x u / y v x x u

This division reveals a systematic pattern of letters: The first two groups (t u u x v and x y u u t) contain the letter u twice. The next two groups (x v y x u and y v x x u) contain the letter x twice.

Explanation

Applying the operators sequentially to the equation gives: 104 ÷ 26 + 13 × 7 - 18 = 77

Using the BODMAS rule, perform the division and multiplication first: 104 ÷ 26 = 4 13 × 7 = 91

Substitute these values back into the equation: 4 + 91 - 18 = 77 95 - 18 = 77 77 = 77

This balances the equation.

Explanation

The coding pattern shifts each letter of the word forward by one position in alphabetical order (+1).

In the word THREE: T becomes U, H becomes I, R becomes S, E becomes F, and E becomes F, resulting in UISFF.

Similarly, in the word SEVEN: S becomes T, E becomes F, V becomes W, E becomes F, and N becomes O, resulting in TFWFO.

Applying this same logic to the word EIGHT: E becomes F I becomes J G becomes H H becomes I T becomes U

This gives the coded word FJHIU.

Explanation

The series follows the pattern where each subsequent number is obtained by multiplying the previous number by 2 and then adding consecutive odd numbers starting from 1:

58 × 2 + 1 = 117 117 × 2 + 3 = 237 237 × 2 + 5 = 479 479 × 2 + 7 = 965 965 × 2 + 9 = 1939