129+ Number Series Questions and Answers

Q:

Choose the missing terms out of the given alternatives Y, B, T, G, O, ?

A) M	B) N
C) K	D) L

Answer & Explanation Answer: D) L

Explanation:

The given sequence is a combination of two series:
i.)Y,T, O and ii.)B, G, ?
i. consists of 2nd, 7th, 12th letters from end of English alphabet,while
ii. consists of 2nd, 7th, 12th letters from beginning of English alphabet
So, the missing letter in ii.) is the 12th letter from the beginning of English alphabet,which is L.

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25 11166

Q:

Find the odd man out of the series 888, 440, 216, 104, 48, 22, 6 ?

A) 104	B) 48
C) 22	D) 216

Answer & Explanation Answer: C) 22

Explanation:

In the given series,

2nd term = $\frac{1 s t t e r m - 8}{2} = \frac{888 - 8}{2} = 440$

3rd term = $\frac{2 n d t e r m - 8}{2} = \frac{440 - 8}{2} = 216$

and so on...

Here 6th term = $\frac{5 t h t e r m - 8}{2} = \frac{48 - 8}{2} = 20$

Therefore, 22 is wrong.

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Exam Prep: Bank Exams
Job Role: Bank Clerk

26 11154

Q:

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

29, 27, 24, ?, 15, 9

A) 22	B) 18
C) 20	D) 16

Answer & Explanation Answer: C) 20

Explanation:

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Exam Prep: Bank Exams

0 10989

Q:

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

2, 5, 9, 14, 20, ?

A) 26	B) 27
C) 30	D) 31

Answer & Explanation Answer: B) 27

Explanation:

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Exam Prep: Bank Exams

7 10911

Q:

Find out the wrong term in the series 3, 7, 15, 39, 63, 127, 255, 511

A) 39	B) 255
C) 127	D) 63

Answer & Explanation Answer: A) 39

Explanation:

The correct pattern is *2+1
So, 39 is wrong and must be replaced by (15 * 2 + 1) = 31

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21 10858

Q:

Find the number which will complete the following series.

0, 1, 8, 27, ?

A) 25	B) 16
C) 125	D) 64

Answer & Explanation Answer: D) 64

Explanation:

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Exam Prep: Bank Exams

3 10856

Q:

Find out the wrong term in the series 125, 126, 124, 127, 123, 129

A) 129	B) 125
C) 127	D) 123

Answer & Explanation Answer: A) 129

Explanation:

The correct pattern is +1, -2, +3, -4, +5, . . . .
So,129 wrong and must be replaced by 123 + 5 = 128

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17 10625

Q:

In the following question a letter-series is given, in which some letters are missing. The missing letters are given in the proper sequence as one of the alternatives. Choose the correct alternatives. ba_ba_bac_acb_cbac

A) bbca	B) ccba
C) cbac	D) aacb

Number Series Questions

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