SSC CGL Tier 1 2014 General Intelligence & Reasoning Questions with Solutions

Explanation

The eagle is a bird of prey characterized by its powerful flight and keen eyesight. Unlike the other birds mentioned, which are flightless, the eagle possesses well-developed wings and a keeled sternum that support the muscles required for sustained aerial movement. The emu, penguin, and kiwi are all flightless birds that have evolved to live on land or in water, lacking the physiological structure necessary for flight.

Explanation

The colors provided constitute the visible spectrum of light, which are traditionally ordered according to their wavelength or frequency. This order is scientifically recognized through the mnemonic VIBGYOR, which stands for Violet, Indigo, Blue, Green, Yellow, Orange, and Red. Following this sequence, the numbers corresponding to the colors are 3 (Violet), 1 (Indigo), 4 (Blue), 5 (Green), 6 (Yellow), 7 (Orange), and 2 (Red). This arrangement represents the natural progression of light as it is dispersed through a medium like a prism, moving from the shortest wavelength at the violet end to the longest wavelength at the red end.

Explanation

To arrange words in dictionary order, they are compared letter by letter from left to right. All five words begin with the same first two letters, Ca. Comparing the third letter, Cardinal, Caricature, Carnivore, and Cartoon all have r, while Category has t. Since r comes before t in the alphabet, Category is placed last in the sequence. Among the words starting with Car, the fourth letters are d in Cardinal, i in Caricature, n in Carnivore, and t in Cartoon. Arranging these fourth letters alphabetically results in the order d, i, n, t, which corresponds to the sequence 2, 1, 3, 4. Combining this with the final word results in the complete alphabetical order 2, 1, 3, 4, 5.

Explanation

The series is formed by the continuous repetition of a six-letter unit: R K S B P M. By dividing the fifteen-character sequence into these blocks, the pattern emerges as (R K S B P M) (R K S B P M) (R K S). Filling the gaps with the letters K, B, R, P, and S in sequence completes the cyclical motif. Specifically, K fills the second position, B fills the fourth, R fills the seventh, P fills the eleventh, and S fills the fifteenth. This results in the complete string R K S B P M R K S B P M R K S, where every letter consistently follows the established six-character period.

Explanation

In the series GGHIHIIGGJKLMGIHIG, we look for instances where the letter I is positioned between the letters H and G in any order, which corresponds to the triplets GIH or HIG. Scanning the sequence from the beginning, the letter I appears several times, but it is not flanked by both H and G until the end of the string. The first valid occurrence is the triplet GIH, found at the 14th, 15th, and 16th positions. This is immediately followed by a second valid occurrence, the triplet HIG, which consists of the 16th, 17th, and 18th positions. These two instances are the only ones in the series that satisfy the specific condition of having I in the middle with H and G as its adjacent neighbors.

Explanation

The given sequence is an interleaved series composed of two distinct arithmetic progressions. The terms at the odd-numbered positions (1st, 3rd, 5th, 7th, and 9th) follow a specific pattern, while the terms at the even-numbered positions (2nd, 4th, 6th, and 8th) follow another.

The first sub-series, consisting of terms at odd positions, is 2, 4, ?, 8, 10. This is an arithmetic progression with a common difference of 2. Applying this rule, the third term in this sub-series (which is the 5th term of the overall sequence) is calculated as 4 + 2 = 6. The subsequent terms 6 + 2 = 8 and 8 + 2 = 10 confirm this pattern.

The second sub-series, consisting of terms at even positions, is 2, 6, 10, 14. This is an arithmetic progression with a common difference of 4, where 2 + 4 = 6, 6 + 4 = 10, and 10 + 4 = 14. As the missing term occupies the 5th position in the original series, it must satisfy the logic of the first sub-series.

Explanation

The series follows a specific pattern for each position of the letters in the four-letter terms. The first letters follow an alphabetical increment of two: E (+2) → G (+2) → I (+2) → K (+2) → M. The second letter in each term is constant and remains L. The third letters also follow an alphabetical increment of two: F (+2) → H (+2) → J (+2) → L (+2) → N. The fourth letter is constant and remains A throughout the series. By combining these individual letter patterns, the missing term after ILJA is determined to be KLLA.

Explanation

The series follows a pattern where the differences between consecutive terms increase by successive odd numbers starting from 5. Calculating the differences between the given terms: 8 - 3 = 5, 18 - 8 = 10, and 35 - 18 = 17. The progression of these differences is 5, 10, 17, ….

To find the underlying rule, observe the second-order differences: 10 - 5 = 5 and 17 - 10 = 7. Following the sequence of odd numbers (5, 7, 9, 11), the next second-order difference must be 9. This makes the next first-order difference 17 + 9 = 26. Therefore, the missing term is 35 + 26 = 61. This pattern is verified by the final term, as the next difference would be 26 + 11 = 37, and 61 + 37 = 98, which matches the series. Alternatively, the differences can be expressed as n² + 1 for n = 2, 3, 4, 5, 6, where the differences are 2²+1=5, 3²+1=10, 4²+1=17, 5²+1=26, and 6²+1=37.

Explanation

Based on the given statements, we can rank the brothers in descending order of darkness. The first statement establishes that L is darker than O (L > O). The third statement specifies that M is fairer than O, which implies O is darker than M (O > M). Combining these two pieces of information, we have the ranking L > O > M. Since the second statement identifies N as the fairest of all, he is at the bottom of the darkness scale. The final order from darkest to fairest is L > O > M > N, identifying L as the darkest of all.

Explanation

To determine the relationship, break down the statement from the end. Anjali's sister's brother is Anjali's own brother. The father of Anjali's brother is Anjali's father. The only son of Anjali's father is Anjali's brother himself. Therefore, the person Anjali is pointing to is her brother.

Explanation

The word TAME can be formed using the letters from the word FUNDAMENTAL because each of its constituent letters is present in the source word. Specifically, FUNDAMENTAL contains the letters T, A, M, and E, which are the exactly the letters required to construct the word TAME.

Explanation

The word MATHEMATICS requires two instances of the letter A and two instances of the letter T. However, the source word THERMODYNAMICS contains only one A and one T. Since the available count of these specific letters is insufficient, MATHEMATICS cannot be formed using the letters of the given word.

Explanation

Let x represent the number of years ago when Kelvin's age was half of Joan's age. At that time, Kelvin's age was 26 - x and Joan's age was 42 - x. According to the problem, Kelvin's age was half of Joan's age:

26 - x = ½(42 - x)

To solve for x, multiply both sides of the equation by 2:

2(26 - x) = 42 - x 52 - 2x = 42 - x

Rearrange the equation to isolate x by adding 2x to both sides and subtracting 42 from both sides:

52 - 42 = 2x - x 10 = x

Ten years ago, Kelvin was 16 years old and Joan was 32 years old. Since 16 is exactly half of 32, the condition is satisfied.

Explanation

The word RATIONAL is coded into RTANIOLA by rearranging the letter positions using a specific sequence. The first letter R remains at the first position. The second and third letters A and T are swapped to become TA. The next three letters I, O, and N are rearranged such that the sixth letter N moves to the fourth position, while the fourth letter I moves to the fifth and the fifth letter O moves to the sixth, resulting in NIO. Finally, the seventh and eighth letters A and L are swapped to become LA.

Applying the same logic to the six-letter word TRIBAL, the first letter T remains at the first position. The second and third letters R and I are swapped to become IR. The fourth, fifth, and sixth letters B, A, and L are rearranged by moving the sixth letter L to the fourth position, the fourth letter B to the fifth position, and the fifth letter A to the sixth position, resulting in LBA. Combining these parts results in the code TIRLBA.

Explanation

The coding follows a direct letter-to-digit substitution method based on the provided examples. By mapping the letters from the words INDUS (03865) and TENNIS (243305), we can determine the specific digit assigned to each letter: I is 0, N is 3, D is 8, U is 6, S is 5, T is 2, and E is 4. To find the code for STUDENT, we replace each letter with its corresponding digit: S becomes 5, T becomes 2, U becomes 6, D becomes 8, E becomes 4, N becomes 3, and T becomes 2. Stringing these digits together results in the code 5268432.

Explanation

The school operates from 8:00 a.m. to 1:30 p.m., which is a total duration of 5 hours and 30 minutes. Since the bell rings every half hour, we calculate the total number of bell-ringing events by dividing the total duration by the interval and adding the initial ring: (5.5)/(0.5) + 1 = 12 events. These events occur at 8:00, 8:30, 9:00, 9:30, 10:00, 10:30, 11:00, 11:30, 12:00, 12:30, 1:00, and 1:30.

The problem specifies that the bell rings 3 times at the beginning (8:00 a.m.), during the lunch break (10:00 a.m. and 10:30 a.m.), and at the end (1:30 p.m.). This results in 4 specific instances where the bell rings 3 times each, totaling 4 × 3 = 12 rings.

For the remaining 12 - 4 = 8 time slots (8:30, 9:00, 9:30, 11:00, 11:30, 12:00, 12:30, and 1:00), the bell rings only once per interval. This results in 8 × 1 = 8 rings. Summing these two parts, the total number of times the bell is rung daily is 12 + 8 = 20.

Explanation

Based on the given symbol transformations, the signs are replaced as follows: × becomes +, - becomes ÷, + becomes ×, and ÷ becomes -. Applying these changes to the equation in option b, we have:

52 - 4 × 5 + 8 ÷ 2 = 36

Using the BODMAS rule, we perform division and multiplication before addition and subtraction:

Division: 8 ÷ 2 = 4 Multiplication: 4 × 5 = 20

Substituting these values back into the expression: 52 - 20 + 4

Performing the final arithmetic: 32 + 4 = 36

The result matches the value on the right-hand side of the equation.

Explanation

The operation Θ follows the logical pattern where the sum of the two numbers is subtracted by their product. The formula for the system is x Θ y = (x + y) - (x × y).

For the first equation: 5 Θ 3 = (5 + 3) - (5 × 3) = 8 - 15 = -7.

For the second equation: 3 Θ 7 = (3 + 7) - (3 × 7) = 10 - 21 = -11.

Applying the same logic to the unsolved equation: 7 Θ 11 = (7 + 11) - (7 × 11) = 18 - 77 = -59.

Explanation

The first statement establishes that the set of chickens is a subset of the set of birds (C ⊆ B). The second statement asserts that there is a non-empty intersection between chickens and hens (C ∩ H ≠ ∅). By substituting the first relation into the second, any element that is both a chicken and a hen must also be a bird because all chickens are birds. Formally, since C ∩ H is a subset of C, and C is a subset of B, it follows that C ∩ H ⊆ B. This guarantees that B ∩ H contains at least those elements found in C ∩ H, making the intersection of birds and hens non-empty. Therefore, the conclusion that some hens are birds is logically certain. Conclusion I is incorrect because the third statement only attributes egg-laying to female birds, and we cannot assume all birds are female. Conclusion III is incorrect because in categorical logic, the statement "Some chickens are hens" does not logically imply that there are chickens which are not hens.

Explanation

The net rotation is calculated by taking the difference between the clockwise and anticlockwise movements. Net rotation = 180° - 135° = 45° clockwise. Starting from the initial position of South, a 45° turn in the clockwise direction moves the orientation into the quadrant between South and West. This results in the final direction being South-West. Alternatively, moving 135° anticlockwise from South positions the man at North-East. A subsequent 180° turn leads to the diametrically opposite direction, which is South-West.

Explanation

The given statement establishes a conditional relationship of the form If P, then Q, where P is the condition of being rich and Q is the result of having a lot of influence. In formal logic, the rule of Modus Ponens (affirming the antecedent) dictates that if the premise P → Q is true and the antecedent P is satisfied, then the consequent Q must necessarily follow. Since Kamala is identified as being rich, she meets the condition P, making the inference that she has a lot of influence a logically valid deduction.