Civil Service Exam Reviewer · Logical Reasoning · hard

Find the missing number: 13 : 183 :: 6 : 43 :: 5 : ?

  1. 31
  2. 120
  3. 24
  4. 30

Answer

A. 31

Solution

Rule: each number is paired with n² + n + 1. Check: 13 → 183 and 6 → 43. So 5 → 31.

More Logical Reasoning questions

  1. Find the missing number: 10 : 1001 :: 13 : 2198 :: 12 : ?
  2. Find the missing number: 4 : 21 :: 13 : 183 :: 10 : ?
  3. Find the missing number: 14 : 2745 :: 4 : 65 :: 6 : ?
  4. Find the missing number: 7 : 344 :: 4 : 65 :: 13 : ?
  5. Find the missing number: 8 : 504 :: 6 : 210 :: 5 : ?
  6. Find the missing number: 11 : 1332 :: 3 : 28 :: 7 : ?
  7. Find the missing number: 5 : 24 :: 3 : 8 :: 8 : ?
  8. Find the missing number: 5 : 51 :: 4 : 33 :: 12 : ?
  9. Find the missing number: 12 : 169 :: 11 : 144 :: 8 : ?
  10. Figure Series 25: Study the series of four figures in the image. Which option (A, B, C or D) comes NEXT in the series?

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