Keystones — Lintel
Five GCSE retrieval questions · 29 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
8300000
Answer: 8.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 37°. Find adjacent side
Answer: 12.8cm -
4. Ratio Mixed ratio problems
Divide 112 in the ratio 1:1:2
Answer: 28, 28 and 56 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 19, 26, 19, what is the missing number?
Answer: 64