Keystones — Lintel
Five GCSE retrieval questions · 6 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.089
Answer: 8.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 58°. Find opposite
Answer: 40cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 45, 47, 44, what is the missing number?
Answer: -4