About Course
Six quick maths tricks that make mental arithmetic feel like magic. Each lesson shows the trick, two worked examples, why it works, and three questions to try (answers included).
Good for: Years 7–10, or anyone who wants to be faster at maths in their head.
You’ll learn to:
- multiply by 11 and by 5 in seconds
- square any number ending in 5
- check divisibility by 3 and 9 at a glance
- flip awkward percentages into easy ones
- multiply numbers near 100 without a calculator
Course Content
Speedy multiplying
Spot it fast
Big numbers, small effort
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