Question 1

What are the common number systems?

Accepted Answer

Decimal (base 10) is standard. Binary (base 2) is used in computing. Hex (base 16) is compact binary. Octal (base 8) was used in older systems.

Question 2

What is 0xFF in decimal?

Accepted Answer

0xFF = 255 in decimal. F = 15, so FF = 15×16 + 15 = 255.

Hex Binary Decimal Converter