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QUESTION
Q
Find out the wrong number in the number series: 5, 7, 16, 57, 244, 1245, 7506

Find out the wrong number in the number series:

5, 7, 16, 57, 244, 1245, 7506

A

7

B

16

C

57

D

244

E

1245

A

7

B

16

C

57

D

244

E

1245

Solution

The pattern of the number series is : 5 × 1 + 12 = 6 ≠ 7 6 × 2 + 22 = 16 16 × 3 +32 =...

The pattern of the number series is :

5 × 1 + 12 = 6 ≠ 7

6 × 2 + 22 = 16

16 × 3 +32 = 57

57 × 4 + 42 = 244

244 × 5 + 52 = 1245

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