Keystones — Lintel
Five GCSE retrieval questions · 11 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.086
Answer: 8.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 18
Answer: (x + 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 40°. Find opposite
Answer: 18.5cm -
4. Ratio Mixed ratio problems
Divide 174 in the ratio 1:4:1
Answer: 29, 116 and 29 -
5. Statistics Mean
The mean of 6 numbers is 37. If 5 of them are 27, 46, 20, 44, 44, what is the missing number?
Answer: 41