Question

Find the next number series?400,800,2400,_?

Answer 1

Answer:

400, 800, 2400 next digit of this series is 9600. It is based on simple calculation.

Here is the explanation for this given condition as follow.  

400x2=800

800x3=2400

2400x4=9600.

This series is goes on based on this condition.  

The multipliers are increased in the ascending order.  

Based on this method, you can easily find out the further digits

Answer 2

7200 is your answer
400✖️2=800; 800✖️3=2400; 2400✖️4=9600

The previous is multiplied by increasing number starting from 2 to get next number.