Logical & Analytical Reasoning

This chapter has

Logical & Analytical Reasoning — solved practice questions

8 WB SI Reasoning & General Studies questions with step-by-step solutions. Attempt each, then reveal the answer.

1. Q1easy

   In a certain code, 'TABLE' is written as 'UBCMF'. How is 'CHAIR' written in the same code?

   • ADIBJS
   • BDIBSJ
   • CDJBIS
   • DEIBJS
   Show answer & solution

   Correct answer: (A) DIBJS

   Each letter is shifted one place forward in the alphabet. C->D, H->I, A->B, I->J, R->S gives DIBJS.

2. Q2easy

   Find the next number in the series: 3, 6, 11, 18, 27, ?

   • A36
   • B38
   • C40
   • D42
   Show answer & solution

   Correct answer: (B) 38

   The differences increase by 2 each time: +3, +5, +7, +9, +11. So 27 + 11 = 38.

3. Q3medium

   Pointing to a photograph, a man said, 'She is the daughter of my grandfather's only son.' How is the woman related to the man?

   • AMother
   • BAunt
   • CSister
   • DCousin
   Show answer & solution

   Correct answer: (C) Sister

   The grandfather's only son is the man's own father, so the father's daughter is the man's sister.

4. Q4hard

   If 'A + B' means A is the mother of B, 'A - B' means A is the brother of B, and 'A x B' means A is the father of B, then which expression shows that P is the maternal uncle of Q?

   • AP - M + Q
   • BP + M - Q
   • CP x M - Q
   • DP - M x Q
   Show answer & solution

   Correct answer: (A) P - M + Q

   P - M means P is M's brother, and M + Q means M is Q's mother. So P is the brother of Q's mother, i.e., Q's maternal uncle.

5. Q5medium

   Choose the odd one out: 8, 27, 64, 100, 125

   • A27
   • B64
   • C100
   • D125
   Show answer & solution

   Correct answer: (C) 100

   8, 27, 64 and 125 are perfect cubes (2^3, 3^3, 4^3, 5^3), but 100 is a perfect square, not a cube.

6. Q6hard

   Statements: All roses are flowers. Some flowers fade quickly. Conclusion: Some roses fade quickly. Is the conclusion valid?

   • ADefinitely true
   • BDefinitely false
   • CDoes not necessarily follow
   • DCannot use the statements
   Show answer & solution

   Correct answer: (C) Does not necessarily follow

   The flowers that fade quickly need not include any roses, so the conclusion is not a necessary consequence of the statements.

7. Q7easy

   A is taller than B but shorter than C. D is taller than C. Who is the tallest?

   • AA
   • BB
   • CC
   • DD
   Show answer & solution

   Correct answer: (D) D

   The order from shortest to tallest is B < A < C < D, so D is the tallest.

8. Q8medium

   If in a certain language MADRAS is coded as NBESBT, then how is BOMBAY coded?

   • ACPNCBZ
   • BCPNCAZ
   • CDPNCBZ
   • DCQNCBZ
   Show answer & solution

   Correct answer: (A) CPNCBZ

   Each letter is replaced by the next letter of the alphabet. B->C, O->P, M->N, B->C, A->B, Y->Z gives CPNCBZ.

Want the full set? Practise all 12 Logical & Analytical Reasoning questions →