129+ Number Series Questions and Answers

Q:

What should be replaced in the place of '?' in the following series ?

QAR, RAS, SAT, TAU, ?

A) UAT	B) UAV
C) UAS	D) UTS

Answer & Explanation Answer: B) UAV

Explanation:

In this series, the third letter is repeated as the first letter of the next segment. The middle letter, A, remains static. The third letters are in alphabetical order, beginning with R.

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7 35049

Q:

What is to be replaced in place of '?' in the following series ?

$A_{2} B C, ?, A B C_{4}, A_{5} B C$

A) $A_{3} B C$

B) $A B C_{3}$

C) $A B_{3} C$

D) $A_{2} B_{3} C_{4}$

A) Option A	B) Option B
C) Option C	D) Option D

Answer & Explanation Answer: C) Option C

Explanation:

Because the letters are the same, concentrate on the number series, which is a simple 2, 3, 4, 5, 6 series, and follows each letter in order.

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6 34805

Q:

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

28, 30, 36, 48, ?, 98, 140

A) 68	B) 65
C) 72	D) 67

Answer & Explanation Answer: A) 68

Explanation:

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Q:

Select the correct option will complete the given number series.

13, 10, 7, 4, ___

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

Answer & Explanation Answer: C) 1

Explanation:

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Q:

Choose the correct alternative which will complete the following series:

21, 55, 19, 50, 17, 45, ?

A) 12	B) 14
C) 13	D) 15

Answer & Explanation Answer: D) 15

Explanation:

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25 33804

Q:

Which number will fit both the series of numbers?

Series A : 1, 4, 9,...
Series B : 1, 8, 27,...

A) 42	B) 36
C) 64	D) 25

Answer & Explanation Answer: C) 64

Explanation:

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4 32848

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 32703

Q:

Which number replaces the '?' in the given series

108, 127, 2413, 2430, 41310, ?, 619875

A) 41975	B) 41325
C) 84375	D) 41365

Answer & Explanation Answer: B) 41325

Explanation:

The given series follows a pattern of +19, x19, +17, x17, +15, x15,...

Here the number which is to be replaced in ? is

41310+15=41325.

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