129+ Number Series Questions and Answers

Q:

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

6578, 4381, 2653, ?, 322

A) 1322	B) 1653
C) 1326	D) 1632

Answer & Explanation Answer: A) 1322

Explanation:

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Exam Prep: Bank Exams

11 13426

Q:

In the following question, various terms of an alphabet series are given with one or more terms missing as shown by (?). Choose the missing terms out of the given alternatives. AZ, GT, MN, ?, YB

A) TS	B) SH
C) KF	D) RX

Answer & Explanation Answer: B) SH

Explanation:

First letter moves 6 steps forward. Second letter moves 6 steps backward.

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67 12580

Q:

Choose the missing terms out of the given alternatives DHL, PTX, BFJ, ?

A) KOS	B) NRV
C) CGK	D) OIK

Answer & Explanation Answer: B) NRV

Explanation:

1.)D + 12 = P
P + 12 = B
B + 12 = N
2.)H + 12 = T
T + 12 = F
F + 12 = R
3.)L + 12 = X
X + 12 = J
J + 12 = V

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48 12235

Q:

Choose the correct alternative that will continue the same pattern and replace 'x' in series 4,9,25,x,121,169,289,361

A) 81	B) 36
C) 64	D) 49

Answer & Explanation Answer: D) 49

Explanation:

The given series consists of squares of consecutive prime numbers
2*2, 3*3, 5*5, . . . . , 11*11, 13*13, 17*17

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39 11731

Q:

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

113, 116, 119, 122, 125, ?

A) 128	B) 126
C) 129	D) 130

Answer & Explanation Answer: A) 128

Explanation:

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Exam Prep: Bank Exams

5 11675

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 11338

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 11308

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 10966

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