129+ Number Series Questions and Answers

Q:

What will come in place of the question mark (?) in the following number series?

256, ?, 190, 167, 148, 131

A) 165	B) 219
C) 136	D) 216

Answer & Explanation Answer: B) 219

Explanation:

Given number series 131 + 17 = 148 148 + 19 = 167 167 + 23 = 190 190 + 29 = 219 219 + 37 = 256

Here addition is based on 17 + 2= 19, 19 + 4 = 23, 23 + 6 = 29, 29 + 8 = 37

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5 40842

Q:

In the following sum, “?” stands for which digit ?

8 + ?8 + 28 + 83 + 8? = 2?8

A) 4	B) 3
C) 2	D) 1

Answer & Explanation Answer: D) 1

Explanation:

By trial and error method from the given options,

'1' satisfies the above given equation.

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10 40751

Q:

In the following question, select the missing number from the given series.

11, 22, 44, 88, 176, ?

A) 350	B) 362
C) 352	D) 282

Answer & Explanation Answer: C) 352

Explanation:

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2 40591

Q:

In the following question, select the missing number from the given series.

24, 26, 28, ?, 32, 34

A) 29	B) 30
C) 31	D) 36

Answer & Explanation Answer: B) 30

Explanation:

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17 40380

Q:

Guess the next number in the given number series?

999, 990, 998, 991, 997, 992, ?

A) 996	B) 1000
C) 999	D) 1001

Answer & Explanation Answer: A) 996

Explanation:

The given number series 999, 990, 998, 991, 997, 992, ?

It follows a pattern that,

999

999 - 9 = 990

990 + 8 = 998

998 - 7 = 991

991 + 6 = 997

997 - 5 = 992

992 + 4 = 996

Hence, the next number in the given number series is 996.

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8 40130

Q:

8, 15, 28, 53, ?, 199

A) 101	B) 102
C) 103	D) 104

Answer & Explanation Answer: B) 102

Explanation:

Here the series of the form is $x 2 - 1, x 2 - 2, x 2 - 3, . . .$

53 x 2 - 4 = 106 - 4 = 102

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325 40124

Q:

In the following question, select the missing number from the given series.

9, 9, 18, 54, 216, ?

A) 1020	B) 1080
C) 636	D) 740

Answer & Explanation Answer: B) 1080

Explanation:

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0 40061

Q:

In the following question, select the missing number from the given series.

1, 3, 5, 7, ?

A) 9	B) 11
C) 10	D) 12

Number Series Questions

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