Keystones — Lintel
Five GCSE retrieval questions · 17 November 2024 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0057
Answer: 5.7 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 26°. Find adjacent side
Answer: 14.4cm -
4. Ratio Mixed ratio problems
Simplify: 8:12:8
Answer: 2:3:2 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 45, 25, 31, what is the missing number?
Answer: 27