Keystones — Lintel
Five GCSE retrieval questions · 5 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.009
Answer: 9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 57°. Find opposite
Answer: 18.5cm -
4. Ratio Mixed ratio problems
Divide 165 in the ratio 4:3:4
Answer: 60, 45 and 60 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 29, 44, 19, 42, what is the missing number?
Answer: 31