Keystones — Lintel
Five GCSE retrieval questions · 7 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.021
Answer: 2.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 31°. Find opposite
Answer: 16.8cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 25, 27, 27, what is the missing number?
Answer: 77