Practice Number Series

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Directions: What should come in place of question mark (?) in the following number series?

Question 1, 5, 13, 25, 41, ?

The given series is in the pattern

+ 4, + 8, + 12, + 16, ..........

So , the missing term

= 41 + 20 = 61

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Directions: What should come in place of question mark (?) in the following number series?

Question 1, 1, 2, 6, 24, ?, 720

100

120

140

160

The given series is in the pattern

×1, ×2, ×3, ×4, ..........

So , the missing term

= 24 × 5= 120

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Directions: What should come in place of question mark (?) in the following number series?

Question 6, 13, 28, 59, ?

100

122

The given series is in the pattern

×2 + 1, × 2 + 2, × 2 + 3,.......

So , the missing term

= 59 × 2 + 4

= 122

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Directions: What should come in place of question mark (?) in the following number series?

Question 3, 15, ?, 63, 99, 143

The given series is in the pattern

(2² – 1), (4² – 1),.......... (8² – 1), (10² – 1), (12² – 1).

So, the missing term is (6² – 1)

= 36 - 1

= 35

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Directions: What should come in place of question mark (?) in the following number series?

Question 5760, 960, ?, 48, 16, 8

385

264

192

126

The given series is in the pattern

÷ 6, ÷ 5, ÷ 4, ÷ 3, ÷ 2.

So, the missing term is

960 ÷ 5

= 192

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Directions: What should come in place of question mark (?) in the following number series?

Question 81, 512, 2401, 7776, 15625, 16384, ?

6561

6580

7561

8590

Series is

\[9^2,8^3,7^4,6^5,5^6,4^7,3^8\]

\[?=3^8\]

\[=6561\]

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Directions: What should come in place of question mark (?) in the following number series?

Question 8, 64, 216, 512, 1000, 1728, ?

2744

1642

3784

2964

Series is

2³ , 4³ , 6³ , 8³ , 10³ , 12³ , .....

Then,

? = 14³

= 2744

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Directions: What should come in place of question mark (?) in the following number series?

Question 72, 63, 54, 45, ?

The gap is of – 9

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Directions: What should come in place of question mark (?) in the following number series?

Question 12, 15, 19, 24, ?

The difference between the numbers increases by 1.

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Directions: What should come in place of question mark (?) in the following number series?

Question 2187, 729, 243, 81, 27, 9, ?

The series is

2187 ÷ 3, 729 ÷ 3, 243 ÷ 3, 81 ÷ 3, 27 ÷ 3, 9 ÷ 3, (3 ÷ 3 = 1)