Keystones — Lintel
Five GCSE retrieval questions · 6 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
170000
Answer: 1.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 38°. Find adjacent side
Answer: 22.cm -
4. Ratio Mixed ratio problems
Simplify: 10:8:6
Answer: 5:4:3 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 16, 16, 30, what is the missing number?
Answer: 86