Keystones — Lintel
Five GCSE retrieval questions · 20 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
9300000
Answer: 9.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 58°. Find adjacent side
Answer: 10.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 31. If 4 of them are 21, 25, 25, 20, what is the missing number?
Answer: 64