129+ Number Series Questions and Answers

Q:

Find out the wrong term in the series 83,92,85,90,85,88

A) 85	B) 88
C) 90	D) 92

Answer & Explanation Answer: A) 85

Explanation:

The correct pattern is +9,-7,+5,-3,+1
So,85 is wrong term and must be replaced by 90-3=87

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6 4614

Q:

Find the next number in the series 265, 269, 278, 284, ?

A) 309	B) 319
C) 298	D) 415

Answer & Explanation Answer: A) 309

Explanation:

The pattern in the given series is +4, +9, +16, +25, ... i.e. $2^{2}, 3^{2}, 4^{2}, 5^{2} . . .$

The next number is 284+25 = 309.

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Exam Prep: GATE , CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk

8 4585

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. A, B, N, C, D, O, E, F, P, ?, ?, ?

A) G, H, Q	B) J, K, L
C) G, H, J	D) G, H, I

Answer & Explanation Answer: A) G, H, Q

Explanation:

The series consists of 2 groups (A, B, C, D, E, F, ?, ?) and (N, O, P, ?). The series is made of two terms of first group followed by one term of second group.

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4 4521

Q:

The missing number in the series 9 81 ? 6561 59049

A) 729	B) 3561
C) 4213	D) None of the above

Answer & Explanation Answer: A) 729

Explanation:

The given series is 9 81 ? 6561 59049

It follows a pattern that

9

81 = 9 x 9

729 = 9 x 9 x 9

6561 = 9 x 9 x 9 x 9

59049 = 9 x 9 x 9 x 9 x 9

Hence, the missing number in the series is 729.

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Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

3 4422

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. ab __ d __ aaba __ na _ badna _ b

A) andaa	B) babda
C) dbanb	D) badna

Answer & Explanation Answer: A) andaa

Explanation:

The series is abadna/abadna/abadna/ab.
The pattern 'abadna' is repeated

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5 4343

Q:

Choose the correct alternative that will continue the same pattern and replace 'x' in the series 3,12,27,48,75,x,147

A) 108	B) 127
C) 112	D) 85

Answer & Explanation Answer: A) 108

Explanation:

The terms of the given series are 3*(1*1),3*(2*2),3*(3*3),3*(4*4), . . . .
So,missing term is 3*(6*6)=108

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3 4279

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. Z, U, Q, ?, L

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

Answer & Explanation Answer: A) N

Explanation:

The letters move 5, 4, 3, ... steps backward.

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3 4255

Q:

Choose the correct alternative that will continue the same pattern and replace 'x' in series 1.5,1.55,1.65,1.8,x

A) 1.95	B) 2.0
C) 1.85	D) 2.05

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