Keystones — Lintel
Five GCSE retrieval questions · 1 July 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0019
Answer: 1.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 18
Answer: (x + 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 57°. Find adjacent side
Answer: 10.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 31. If 5 of them are 37, 42, 36, 21, 44, what is the missing number?
Answer: 6