Keystones — Lintel
Five GCSE retrieval questions · 16 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
66000000
Answer: 6.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 28°. Find adjacent side
Answer: 13.2cm -
4. Ratio Mixed ratio problems
Divide 176 in the ratio 2:1:1
Answer: 88, 44 and 44 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 49, 33, 18, what is the missing number?
Answer: 60