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J&K Bank PO · Reasoning Ability · 44 practice questions with answers and explanations: 22 Easy, 21 Medium, 1 Hard.

Sample questions

Sample Easy question 1

Find the next number: 1, 3, 6, 10, 15, ?

  1. 20
  2. 19
  3. 21
  4. 18
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Answer: C. These are triangular numbers (sum of 1 to n); the next difference is 6, so 15 + 6 = 21.

Sample Easy question 2

Find the next number: 1, 3, 7, 15, 31, ?

  1. 63
  2. 71
  3. 55
  4. 47
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Answer: A. Each term follows (previous × 2) + 1: 31 × 2 + 1 = 63 — this is 2ⁿ - 1 for n = 1,2,3,4,5,6.

Sample Easy question 3

Find the value that completes the pair: (2, 5), (3, 10), (4, 17), (5, ?)

  1. 26
  2. 30
  3. 28
  4. 24
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Answer: A. Each pair follows (n, n² + 1): 5² + 1 = 26.

Sample Medium question 4

Find the next pair's missing value: (3, 10), (4, 17), (5, 26), (6, ?)

  1. 37
  2. 39
  3. 35
  4. 41
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Answer: A. Each pair follows (n, n² + 1): 6² + 1 = 37.

Sample Medium question 5

Find the next term: A2, C4, E8, G16, ?

  1. I32
  2. J32
  3. I24
  4. H32
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Answer: A. Letters skip one each time (A,C,E,G,I) and the number doubles each time (2,4,8,16,32), giving I32.

Sample Medium question 6

Find the next number: 2, 3, 5, 7, 11, 13, ?

  1. 15
  2. 17
  3. 19
  4. 16
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Answer: B. This is the sequence of prime numbers; the next prime after 13 is 17.

Sample Hard question 7

Find the next number: 2, 5, 14, 41, ?

  1. 124
  2. 122
  3. 128
  4. 120
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Answer: B. Each term follows (previous × 3) - 1: 41 × 3 - 1 = 122.

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