Keystones — Lintel
Five GCSE retrieval questions · 7 April 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0006
Answer: 6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 55°. Find opposite
Answer: 37.cm -
4. Ratio Mixed ratio problems
Divide 232 in the ratio 1:2:1
Answer: 58, 116 and 58 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 46, 38, 45, what is the missing number?
Answer: 15