Missing Numbers Quiz Set 040 | Missing Numbers Type of Questions for Aptitude and Reasoning Exams Set 40 | Online self tests for IBPS, Clerical, SO, SSC, SSB, NTSE, Mental Ability Exams

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Question 1

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

10, 12, 28, 90, 368, 1840, 11112

1840

368

Soln.
Ans: a

Number 1840 is wrong and should be replaced by 1850. The series is 10 X 1 + 2 = 12. then 12 X 2 + 4 = 28, then 28 X 3 + 6 = 90, then 90 X 4 + 8 = 368, then 368 X 5 + 10 = 1850, not 1840.

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Question 2

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

49, 56, 64, 71, 81, 90, 100, 110

Soln.
Ans: c

The series is: 7 X 7, 7 X 8, 8 X 8, 8 X 9, 9 x 9, 9 X 10, 10 X 10, 10 X 11, so instead of 71 we should have 72.

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Question 3

Which one number is like the given numbers 134, 246, 358?

372.

470.

572.

684.

Soln.
Ans: b

The difference of any two numbers is divisible by 112. 246 - 134 = 112, and 470 - 358 = 112.

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Question 4

What is missing?

44.

55.

80.

88.

Soln.
Ans: d

The numbers in the second figure are those of the first divided by 2. Like 18 = 36/2, 22 = 44/2, 11 = 22/2. They are arranged randomly. Similarly, those in the third figure are those of the first multiplied by 2.

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Question 5

Examine this series: 25, 194, 73, 154, 105. If another series is written with the same rule, what number would come in the place E: 14, A, B, C, D, E ?

120

116

119

202

Soln.
Ans: c

The number 119 will come in place of (E). 25 + 13² = 194, then 194 - 11² = 73, then 73 + 9² = 154, and so on. So A = 14 + 13² = 183, then B = 183 - 11² = 62, C = 62 + 9² = 143, D = 143 - 7² = 94, E = 94 + 5² = 119.

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