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Images and colour depth
Calculate how many colours a bitmap can show and how big its file is from its resolution and colour depth.
⏱ 20 min❓ 9 questions
What you'll be able to do
- ✔I can explain resolution and colour depth in a bitmap image
- ✔I can calculate the number of colours from the colour depth
- ✔I can calculate the uncompressed file size of a bitmap image
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
- 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
9 questions and 1 quick teaching card, including:
- 🔢Number answer — Work out the answer and type the number.
👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.
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Curriculum: AC9TDI8K03