Keystones — Lintel
Five GCSE retrieval questions · 21 June 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.058
Answer: 5.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 49°. Find adjacent side
Answer: 24.9cm -
4. Ratio Mixed ratio problems
Simplify: 16:8:16
Answer: 2:1:2 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 45, 49, 31, 46, what is the missing number?
Answer: 24