Keystones — Lintel
Five GCSE retrieval questions · 31 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.097
Answer: 9.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 44°. Find adjacent side
Answer: 28.cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 40. If 5 of them are 42, 19, 30, 40, 47, what is the missing number?
Answer: 62