How a computer represents information
Answers are for parents and teachers.
1
A text has 1536 characters. How many KB? (1 character = 1 byte)
1.5
2
Code the word “GUL” in ASCII (G = 71, U = 85, L = 76).
01000111 01010101 01001100
3
How many bytes does a black-and-white (2-colour) 1280 × 720 picture take?
115200
4
What is the minimum number of bits to code 100 different characters? Justify with the inequality.
7 bits: 2⁶ = 64 < 100 ≤ 128 = 2⁷.
5
How many bits of information are in the title of your favourite book? (1 character = 8 bits, a space is also a character)
The answer depends on the title: number of characters · 8. For example “ALPOMISH” – 8 characters = 64 bits.