Keystones — Lintel
Five GCSE retrieval questions · 4 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
8400000
Answer: 8.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 58°. Find opposite
Answer: 33.6cm -
4. Ratio Mixed ratio problems
Divide 240 in the ratio 4:1:3
Answer: 120, 30 and 90 -
5. Statistics Mean
The mean of 6 numbers is 21. If 5 of them are 26, 33, 26, 30, 42, what is the missing number?
Answer: -31