This challenge is about how computers understand information using 'on' and 'off' signals called binary. You'll convert numbers between systems (denary, binary, hexadecimal) and calculate file sizes for pictures and sounds.
Mastering this helps you understand how all your digital gadgets work!
Example: Convert the denary (decimal) number 13 to its binary equivalent.
Walkthrough:
We use "repeated division by 2", noting the remainder.
13 ÷ 2 = 6 remainder 1 (First binary digit, from the right!)
6 ÷ 2 = 3 remainder 0
3 ÷ 2 = 1 remainder 1
1 ÷ 2 = 0 remainder 1 (Stop when number is 0)
Read remainders upwards: 1101.