Largest number represented in Bits, Decimal and Hexadecimal?

Question

What is the largest number that can be represented in:

- 10 bits?

- 9 decimal digits?

- 8 hexadecimal digits?

Could you please show how you did it and how you got your answer.

Cheers

Answer 1

well

10 bits is

1111111111

1x2(to the power of zero) =1

1x2(to the power of one)b =2

1x2(to the power of two) =4

1x2(to the power of three) =8

1x2(to the power of four) =16

1x2(to the power of five) =32

1x2(to the power of six) =64

and so on, so the answer would be the sum of all of them