Keystones — Lintel
Five GCSE retrieval questions · 24 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
58000000
Answer: 5.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 43°. Find adjacent side
Answer: 22.7cm -
4. Ratio Mixed ratio problems
Divide 180 in the ratio 4:1:4
Answer: 80, 20 and 80 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 33, 41, 36, what is the missing number?
Answer: -2