Question 1

How to convert decimal to binary?

Accepted Answer

Repeatedly divide the decimal number by 2, record each remainder, then arrange remainders from bottom to top. Example: 10 → 1010.

Question 2

What do A-F represent in hexadecimal?

Accepted Answer

Hexadecimal uses 16 symbols (0-9 and A-F), where A=10, B=11, C=12, D=13, E=14, F=15.

Question 3

Why do computers use binary?

Accepted Answer

Computers use binary because circuits have only two states — high and low voltage — corresponding to 1 and 0, which is the simplest and most reliable implementation.