Keystones — Lintel
Five GCSE retrieval questions · 21 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
960000
Answer: 9.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 57°. Find opposite
Answer: 24.6cm -
4. Ratio Mixed ratio problems
Divide 60 in the ratio 4:1:1
Answer: 40, 10 and 10 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 37, 32, 27, 27, what is the missing number?
Answer: 62