Question

Which is the next number in this series?
8, 40, 840, ?
Pick ONE option
A. 326440
B. 324404
o
C. 353640
D. 352484
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Answer 1

Answer:

Step-by-step explanation:

So guys

Here is the solution

First no is 8 so

8/2=4

8*(4+1)=40

Second no is 40

40/2=20

40*(20+1)=840

Third no is 840

840/2=420

840*(420+1)=353640

Answer 2

Given:

The series is 8, 40, 840

To Find:

The next number in the series

Solution:

The series follows a pattern of n/2 and n( value +1)  

Taking the first number = 8  

Thus,

8/2=4

8 x (4+1)

8 x 5  

= 40

Similarly, the second no = 40

40/2=20

40 x (20+1)

40 x 21

= 840

Third no = 840

840/2=420

840 x ( 420 +1)

840 x 421

= 353640

Answer: The next value in the series is 353640