Question

What value will come in place of question mark (?) in the number - series given below ?

4, 30, ?, 1440, 7195, 71940
A) 145
B) 545
C) 650
D) 999

Answer 1

What value will come in place of question mark (?) in the number - series given below ?

4, 30, ?, 1440, 7195, 71940
A) 145
B) 545
C) 650
D) 999

Answer: A) 145

Explanation:

4 30 ? 1440 7195 71940

Here a given series follow a pattern of

4

4 × 10 - 10 = 30

30 × 5 - 5 = 145

145 × 10 - 10 = 1440

1440 × 5 - 5 = 7195

7195 × 10 - 10 = 71940

Hence, the missing number is 145.

Answer 2

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9

Q:

What value will come in place of question mark (?)in the number - series given below  ? 

4, 30, ?, 1440, 7195, 71940

A) 145B) 545C) 650D) 999

Answer:   A) 145 

Explanation:

4       30       ?     1440       7195      71940

 

Here the given series follows a pattern of

 

4

 

4 x 10 - 10 = 30

 

30 x 5 - 5  = 145

 

145 x 10 - 10 = 1440

 

1440 x 5 - 5 = 7195

 

7195 x 10 - 10 = 71940

 

Hence, the missing number is 145
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