Keystones — Lintel
Five GCSE retrieval questions · 19 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0088
Answer: 8.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 49°. Find opposite
Answer: 12.7cm -
4. Ratio Mixed ratio problems
Simplify: 24:16:8
Answer: 3:2:1 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 19, 49, 42, 31, 31, what is the missing number?
Answer: 2