Missing Numbers Quiz Set 029 | Missing Numbers Type of Questions for Aptitude and Reasoning Exams Set 29 | Online self tests for IBPS, Clerical, SO, SSC, SSB, NTSE, Mental Ability Exams

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Question 1

Directions: Find the missing number in the following series.

5, 7, ?, 9, 7, 11, 8, 13

Soln.
Ans: b

There are two alternate series 5, 6, 7, 8 and 7, 9, 11, 13. Hence, the missing number will be 6.

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Question 2

One number is wrong in the series. Find the wrong number.

701, 348, 173, 85, 41, 19, 8

173

348

Soln.
Ans: d

Series follows the pattern from the right end 8 × 2 + 3 = 19, 19 × 2 + 3 = 41, 41 × 2 + 3 = 85, 85 × 2 + 3 = 173, 173 × 2 + 3 = 349, 349 × 2 + 3 = 701. Hence, the number 348 should be replaced by 349. So 348 is wrong.

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Question 3

10.

11.

Soln.
Ans: d

3 x 4 - 8 = 4, 2 x 5 - 4 = 6 ∴ 4 x 5 - 9 = 11.

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Question 4

In the following number series, one of the numbers does not fit into the series. Find the wrong number.

4, 5, 14, 39, 103, 169, 290

103

Soln.
Ans: d

Number 103 is wrong and should be replaced by 88. The series is: 5 = 4 + 1², then 5 + 3² = 14, then 14 + 5² = 39, then 39 + 7² should give 88, not 103.

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