Keystones — Lintel
Five GCSE retrieval questions · 5 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
37000000
Answer: 3.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 31°. Find adjacent side
Answer: 24cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 40, 16, 20, what is the missing number?
Answer: 56