Keystones — Lintel
Five GCSE retrieval questions · 24 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0059
Answer: 5.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 43°. Find opposite
Answer: 14cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 1:2:3
Answer: 28, 56 and 84 -
5. Statistics Mean
The mean of 4 numbers is 22. If 3 of them are 48, 35, 20, what is the missing number?
Answer: -15