Find the next number in the given number series? | Odd Man Out Questions & Answers

Q:

A man saves Rs. 200 in each of the first three months of his service. In each of the subsequent months his saving increases by Rs. 40 more than the saving of immediately previous month. His total saving from the start of service will be Rs. 11040 after ?

A) 19 months	B) 21 months
C) 18 months	D) 20 months

Answer & Explanation Answer: B) 21 months

Explanation:

Total savings = 200 + 200 + 200 + 240 + 280 + ... to n months = 11040

= 120 + 80 + 160 + 40 + 200 + 240 + ....n terms
= 40 + 80 + 120 + 160 + 200 + 240 + ...n terms
= n/2[2a + (n-1)d] + 80 + 40 = 11040
= n/2[240 + (n-1)40] = 10920
= n[6+n-1] = 546
= n[n+5] = 546
n = 21

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9 10216

Q:

Find out the wrong number in the following series ?

2880, 480, 92, 24, 8, 4, 4

A) 480	B) 92
C) 24	D) 4

Answer & Explanation Answer: B) 92

Explanation:

The given series of numbers follow the rule that,

2880/6 = 480
480/5 = 96
96/4 = 24
24/3 = 8
8/2 = 4
4/1 = 4

But 92 is not in the rule. It is the wrong number in the given series.

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7 41353

Q:

Find out the wrong term in the given series of numbers ?
6, 15, 35, 77, 165, 221

A) 35	B) 165
C) 221	D) 77

Answer & Explanation Answer: B) 165

Explanation:

The given series follow the rule that :

Multiplying consecutive prime numbers
2,3,5,7,11,13,17,19....
2x3 = 6
3x5 = 15
5x7 = 35
7x11 = 77
11x13 = 143
13x17 = 221
So, the wrong term is 165.

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6 5924

Q:

Find the odd one out ?

Hawk , Parrot , Owl , Eagle

A) Eagle	B) Owl
C) Parrot	D) Hawk

Answer & Explanation Answer: C) Parrot

Explanation:

All except Parrot are birds of prey.

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18 70727

Q:

3125 256 ? 4 1

Which number replaces the "?" in the question?

A) 27	B) 128
C) 32	D) 64

Answer & Explanation Answer: A) 27

Explanation:

In the given series numbers are arranged following the rule,

$5^{5}, 4^{4}, 3^{3}, 2^{2}, 1^{1}$

Therefore, the missing number is 27.

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Job Role: Bank PO

17 43260

Q:

Insert the missing number.

3, 7, 6, 5, 9, 3, 12, 1, 15, (....)

A) 18	B) 13
C) -1	D) 3

Answer & Explanation Answer: C) -1

Explanation:

There are two series, beginning respectively with 3 and 7. In one 3 is added and in another 2 is subtracted.

The next number is 1 - 2 = -1.

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73 64739

Q:

Insert the missing number.

2, 6, 12, 20, 30, 42, 56, (....)

A) 61	B) 64
C) 72	D) 70

Answer & Explanation Answer: C) 72

Explanation:

The pattern is 1 x 2, 2 x 3, 3 x 4, 4 x 5, 5 x 6, 6 x 7, 7 x 8.

So, the next number is 8 x 9 = 72.

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90 100405

Q:

Insert the missing number.

16, 33, 65, 131, 261, (....)

A) 523	B) 521
C) 613	D) 721

Answer & Explanation Answer: A) 523

Explanation:

Each number is twice the preceding one with 1 added or subtracted alternatively.

So, the next number is (2 x 261 + 1) = 523.

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44 152322

A) 295.651	B) 354.146
C) 398.78	D) 450.187

Find the next number in the given number series?

3, 10.5, 36.75, 128.625, ?

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Find the next number in the given number series? 3, 10.5, 36.75, 128.625, ?

Quick Links

Find the next number in the given number series?

3, 10.5, 36.75, 128.625, ?