series

Question

25, 100, ?, 1600, 6400
A.  400
B.  300
C.  360
D.  420
E.  None of these

Answer 1

Here,the number is multiplied by 4 successively to get the next result.

$25 \times 4 =100$

$100 \times 4 =400$

$400 \times 4 =1600$

$1600 \times 4 =6400$

 

Hence,Option(A)$400$ is the correct choice.

Answer 2

The pattern is as follows:

• $25*4=100$
• $100*4=400$
• $400*4=1600$
• $1600*4=6400$

Another observation:

The given series is a completely divisible series. each number is div by 4.

Hence option (A) 400 is correct.

Answer 3

Option A