SSC CHSL Tier 1 2011 General Intelligence & Reasoning Questions with Solutions

Explanation

The flute is a wind instrument, or aerophone, that produces sound when a stream of air is directed across an opening, causing the column of air inside the tube to vibrate. In contrast, the other instruments in the group are stringed instruments, or chordophones, which generate sound through the vibration of physical strings when they are plucked or bowed. This fundamental difference in the mechanism of sound production distinguishes the flute from the rest.

Explanation

Tomato is botanically classified as a fruit and grows above the ground, whereas the other three grow underground as modified roots or stems.

Explanation

The number 516 is not a perfect cube of any integer, whereas all the other numbers are perfect cubes of integers, namely 5³ = 125, 7³ = 343, and 9³ = 729.

Explanation

The number 100 is a perfect square (10²), whereas the other numbers are perfect cubes of consecutive integers, specifically 4³ (64), 5³ (125), and 6³ (216). This makes 100 the only number in the group that is not a perfect cube.

Explanation

The given words can be arranged in a logical ascending order based on their social and geographical hierarchy, starting from the smallest unit and moving to the largest.

First, individual members make up the basic unit of society. Second, a group of individual members living together forms a family. Third, multiple families living in a shared environment form a community. Fourth, a larger collection of communities in a local area constitutes a village. Fifth, an even larger, more developed, and densely populated urban area is classified as a city.

This establishes the logical sequence from smallest to largest as members, family, community, village, and city, which is represented by 1, 4, 5, 3, 2.

Explanation

The sequence represents the natural process of manufacturing from raw materials to a finished product. The process begins with the extraction of raw Ore (3). This raw ore undergoes Purification (4) to extract the pure Metal (1). The extracted metal is then combined with other elements to form an Alloy (2). Finally, this alloy is used to manufacture various finished goods like Spare parts (5).

Explanation

The letters in each position of the terms in the series follow distinct arithmetic patterns based on their alphabetical positions.

For the first letter, there is a constant addition of 1 to the alphabetical position: L (12), M (13), N (14), O (15), which leads to P (16).

For the second letter, there is a constant subtraction of 4 from the alphabetical position: X (24), T (20), P (16), L (12), which leads to H (8).

For the third letter, there is a constant addition of 4 to the alphabetical position: F (6), J (10), N (14), R (18), which leads to V (22).

Combining these results gives the next term in the series as PHV.

Explanation

The series is formed by incrementing the alphabetical position of each letter in consecutive terms.

The first letter of each term increases by 1, following the progression B (2) to C (3) to D (4) to E (5).

The second letter of each term increases by 2, following the progression D (4) to F (6) to H (8) to J (10).

The third letter of each term increases by 3, following the progression F (6) to I (9) to L (12) to O (15).

Explanation

The series follows a specific addition pattern for each letter position:

First letters: A (1), D (4), G (7) The pattern is to add 3 to the position of each previous letter. 7 + 3 = 10, which corresponds to J.

Second letters: L (12), N (14), P (16) The pattern is to add 2 to the position of each previous letter. 16 + 2 = 18, which corresponds to R.

Third letters: N (14), P (16), R (18) The pattern is to add 2 to the position of each previous letter. 18 + 2 = 20, which corresponds to T.

Combining the three derived letters gives JRT.

Explanation

By treating the hyphen as a decimal point, the terms in the series represent decimal numbers: 1.5, 2.3, 3.1, 3.9, ...

This sequence forms an arithmetic progression with a common difference of 0.8: 1.5 + 0.8 = 2.3 2.3 + 0.8 = 3.1 3.1 + 0.8 = 3.9

To find the next term in the series, add 0.8 to the last term: 3.9 + 0.8 = 4.7

Converting the decimal 4.7 back to the hyphenated format gives 4-7.

Explanation

The given series follows an alternating pattern of multiplication by 2 followed by subtraction of 8.

First term: 14 Second term: 14 × 2 = 28 Third term: 28 - 8 = 20 Fourth term: 20 × 2 = 40 Fifth term: 40 - 8 = 32 Sixth term: 32 × 2 = 64 Seventh term: 64 - 8 = 56

Explanation

To arrange the given words in alphabetical order as they would appear in a dictionary, we compare them letter by letter from left to right. All four words share the first four letters, c-o-l-l. Comparing the fifth letter of each word, collegiate has e, collinear and collision have i, and colloquy has o. Since e comes before i, and i comes before o, collegiate is the first word in the sequence, and colloquy is the fourth. Next, comparing collinear and collision, both have i as the fifth letter. Looking at the sixth letter, collinear has n and collision has s. Since n precedes s in the alphabet, collinear is the second word, which makes collision the third word in alphabetical order.

Explanation

Let the starting point be the origin (0, 0) on a coordinate plane where the positive x-axis represents East, the negative x-axis represents West, the positive y-axis represents North, and the negative y-axis represents South.

First, Khan travels 8 km West, which places him at the coordinates (-8, 0).

Next, facing West, a right turn points him North. Travelling 2 km in this direction puts him at (-8, 2).

Finally, facing North, another right turn points him East. Travelling 5 km in this direction changes his coordinates to (-8 + 5, 2), which is (-3, 2).

Since his final position (-3, 2) has a negative x-coordinate and a positive y-coordinate, he is located in the North-West quadrant with reference to his starting point.

Explanation

Let us represent the relationship using the level of wealth, where a higher position means richer and a lower position means poorer.

From the first statement, X is poorer than W, which means W is richer than X. The same statement says X is not as poor as B, which means X is richer than B. This gives the order of wealth as B < X < W.

From the second statement, C is not as poor as X, which means C is richer than X. This is represented as X < C.

Combining these relationships, both W and C are richer than X, and X is richer than B. Therefore, B has the least wealth, making B the poorest of all.

Explanation

The next bus is scheduled to leave at 10:30 a.m. Since the bus service operates at a 30-minute interval, the previous bus must have departed 30 minutes prior to this, which was at 10:00 a.m.

The enquiry clerk stated that the bus left 10 minutes ago, meaning 10 minutes have elapsed since the departure of the 10:00 a.m. bus. Adding these 10 minutes to the departure time of the previous bus gives the current time:

10:00 a.m. + 10 minutes = 10:10 a.m.

Explanation

The word Coffee contains two Fs (C, O, F, F, E, E), whereas the base word Ecofriendly contains only a single letter F. Since there is only one F available in Ecofriendly, the word Coffee cannot be formed.

Explanation

The word RELATE requires two E's to be formed. However, the word LIBERALISATION contains only one E. Because of this deficiency, the word RELATE cannot be formed using the letters of LIBERALISATION.

Explanation

The coding pattern involves shifting each letter of the word one position backward in the alphabetical sequence. For the word PRIEST, subtracting one from the alphabetical position of each letter yields:

P changes to O R changes to Q I changes to H E changes to D S changes to R T changes to S

Applying this same subtraction rule to the word PRISTINE:

P becomes O R becomes Q I becomes H S becomes R T becomes S I becomes H N becomes M E becomes D

This yields the coded sequence OQHRSHMD.

Explanation

The code for each letter is obtained by shifting it forward by 10 positions in the alphabetical order.

Applying this rule to DEAN: D (4) + 10 = 14 (N) E (5) + 10 = 15 (O) A (1) + 10 = 11 (K) N (14) + 10 = 24 (X)

Following the same +10 shift rule for NEED: N (14) + 10 = 24 (X) E (5) + 10 = 15 (O) E (5) + 10 = 15 (O) D (4) + 10 = 14 (N)

Explanation

The coding pattern divides the nine-letter word into three equal groups of three letters each, and then reverses the order of the letters within each group.

For the word OPERATION: The first three letters O P E are reversed to E P O. The middle three letters R A T are reversed to T A R. The last three letters I O N are reversed to N O I. Combining them gives the code EPOTARNOI.

Applying this same decoding logic to the coded word ORPSECSES: The first three letters O R P are reversed to P R O. The middle three letters S E C are reversed to C E S. The last three letters S E S are reversed to S E S. Combining these groups yields the original word PROCESSES.

Explanation

In each column, the third number is equal to the sum of the squares of the first two numbers.

For the first column: 1² + 5² = 1 + 25 = 26

For the second column: 3² + 2² = 9 + 4 = 13

For the third column: 4² + 8² = 16 + 64 = 80

Explanation

The relationship between the numbers in the first row and the second row follows the mathematical formula:

Row 2 number = (Row 1 number)² + 5

Applying this formula to each column:

For the first column: 10² + 5 = 100 + 5 = 105

For the second column: 11² + 5 = 121 + 5 = 126

For the third column: 12² + 5 = 144 + 5 = 149

Explanation

In each column of the given number matrix, the relationship among the values in the rows is:

Row 1 = Row 2 + Row 3 × Row 4

Applying this rule to each column:

For the first column: 1 + 2 × 3 = 1 + 6 = 7

For the second column: 3 + 5 × 4 = 3 + 20 = 23

For the third column, letting the missing number be x: x + 7 × 3 = 21 x + 21 = 21 x = 0

Explanation

The sequence can be understood by grouping the terms into pairs of consecutive fractions: First pair: 11/2 (printed as 11/5 in some versions) and 5/8 Second pair: 7/3 and the missing term

For the first pair, the relationship is as follows: The numerator of the second term is obtained by subtracting 1 from the numerator of the first term and dividing by 2: (11 - 1) ÷ 2 = 5 The denominator of the second term is the cube of the denominator of the first term: 2³ = 8

For the second pair, applying the same pattern: The numerator of the missing term is obtained by subtracting 1 from the numerator of the first term in the pair and dividing by 2: (7 - 1) ÷ 2 = 3 The denominator of the missing term is the cube of the denominator of the first term in the pair: 3³ = 27

This gives the missing term as 3/27.

Explanation

Representing the relative heights of the individuals using inequality symbols, the given relationships can be written as follows:

Srini is taller than Anlu: Srini > Anlu

Srini is shorter than Chandru: Chandru > Srini

Ragu is taller than Chandru but shorter than Brinda: Brinda > Ragu > Chandru

Combining these statements into a single continuous chain of inequalities gives:

Brinda > Ragu > Chandru > Srini > Anlu

This sequential ordering demonstrates that Brinda has the greatest height among all the individuals.

Explanation

According to the given code, the mathematical operators are substituted as follows: – becomes +

• becomes × × becomes ÷ ÷ becomes -

Substituting these symbols into the equation in Option A: 5 - 2 + 12 × 6 ÷ 2 = 27

We get: 5 + 2 × 12 ÷ 6 - 2

Applying the BODMAS rule: First, division: 12 ÷ 6 = 2 The equation becomes: 5 + 2 × 2 - 2

Next, multiplication: 2 × 2 = 4 The equation becomes: 5 + 4 - 2

Finally, addition and subtraction: 9 - 2 = 7

Since 7 is not equal to 27, this equation is wrong.

Explanation

Since all five friends are facing South, their right side points towards the West (left of the row on paper) and their left side points towards the East (right of the row on paper).

Raju is to the immediate right of Praveen, which means Raju is placed immediately to the West of Praveen.

Mohan is between Balu and Raju. Since Praveen is already immediately to the East of Raju, Mohan and Balu must be positioned to the West of Raju, establishing the order Balu, Mohan, Raju, Praveen.

Amith is to the right of Balu, meaning Amith is placed to the West of Balu.

This gives the final arrangement from West to East as Amith, Balu, Mohan, Raju, Praveen. The extreme right end of a South-facing row corresponds to the West-most position, which is occupied by Amith.

Explanation

Let the starting position of Ram's house be represented as the origin. Ram walks 4 kms North, then turns West and walks 3 kms, and finally walks 8 kms South.

This movement forms a right-angled triangle where the horizontal distance from the starting point is 3 kms, and the vertical distance from the starting point is 8 - 4 = 4 kms.

Using the Pythagorean theorem to find the shortest direct distance: Distance = √(3² + 4²) Distance = √(9 + 16) Distance = √25 Distance = 5 kms

Explanation

To evaluate the conclusions, we can analyze the relationship between the sets defined by the statements:

First, all first-year students are cricket fans, and some of these first-year students are also tennis fans. This implies that there are some first-year students who are not tennis fans.

Second, only some tennis fans are football fans. Since there is no universal positive connection established between first-year students and football fans, it is impossible for all first-year students to be football fans. Therefore, it logically follows that some first-year students are not football fans, validating conclusion IV.

Additionally, the statements only describe who is a fan of a sport, rather than who actually plays it, meaning we cannot conclude that any first-year students play cricket. No information is provided about students other than first-year students, so no claims can be made about them. Therefore, only conclusion IV follows.

Explanation

By the rules of syllogism, a particular affirmative proposition of the form Some A are B can be immediately converted into another particular affirmative proposition of the form Some B are A.

Applying this rule to Statement 1, Some books are mobiles converts directly to Some mobiles are books. This makes Conclusion II logically valid.

Applying the same rule to Statement 2, Some calculators are mobiles converts directly to Some mobiles are calculators. This makes Conclusion I logically valid.

Since both Conclusion I and Conclusion II are valid immediate inferences derived by converting the given statements, both conclusions follow.

Explanation

Both of the given statements are negative premises. According to the rules of syllogism, no definite conclusion can be drawn between two terms if they are connected through two negative premises. Consequently, no relationship can be established between flower and garden, which makes Conclusion I invalid. Additionally, the second statement asserts that no pot is a garden, which directly contradicts the claim in Conclusion II that all gardens are pots, making Conclusion II invalid as well.

Explanation

The given text represents a 2×2 grid of numbers: 2 9 ? 28

Reading the numbers in sequential order (2, 9, 28, ?), they follow a pattern based on the cubes of consecutive natural numbers increased by 1: First term: 1³ + 1 = 2 Second term: 2³ + 1 = 9 Third term: 3³ + 1 = 28

Following this pattern, the fourth term, which replaces the question mark, is calculated as: 4³ + 1 = 64 + 1 = 65

Explanation

The word GENERAL contains the letters R and A, which are completely absent in the parent word INTELLIGENCE. As a result, GENERAL cannot be formed using the letters of the given word.

Explanation

Robert starts by facing West. Clockwise turns are taken as positive angles and anticlockwise turns as negative angles. He turns 120° clockwise and then 180° anticlockwise, giving a net angular change of 120° - 180° = -60°. This negative sign indicates a net turn of 60° in the anticlockwise direction from his initial position. Turning 60° anticlockwise from West shifts his orientation towards the South, placing him in the South-West direction.

Explanation

A pen is fitted with a nib to write. In the given coded language, a nib is called a needle. Thus, a needle is the term for what will be fitted in a pen to write with it.