Keystones — Lintel
Five GCSE retrieval questions · 14 October 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.088
Answer: 8.8 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 52°. Find opposite
Answer: 21.8cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 50, 15, 16, what is the missing number?
Answer: 67