Keystones — Lintel
Five GCSE retrieval questions · 5 November 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
71000
Answer: 7.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 52°. Find opposite
Answer: 19.2cm -
4. Ratio Mixed ratio problems
Divide 114 in the ratio 1:2:3
Answer: 19, 38 and 57 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 49, 23, 23, 41, 19, what is the missing number?
Answer: 1