Question

400, 800, 2400 next digit of this series

Answer 1

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

There are 2 valid answers to the following question.    1.   400*2=800. 800*3=2400. 2400*4=9600.[Required answer].      Here in this progression, we are adding 1 to the number being multiplied by result of the previous steps.      2.   (0+400)*2=800. (400+800)*2=2400. (400+800+2400)*2=7200.[also a valid answer].      Here the second numbering the same i.e., 2, but the first number in each step is the sum of the previous result and the number with which we started.