Question

400,800,2400 next digit number

Answer 1

400,800,2401 is the right ANSWER
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Answer 2

Hey mate,

Here is your answer :-

Answer : 9600

Explanation : First number = 400
Multiply by 2, then the answer is 800. Now multiply 800 by 2 then the answer is 2400. now the next number after 2 and 3 is 4. So multiply 2400 by 4. Finally the answer is 9600