Keystones — Lintel
Five GCSE retrieval questions · 12 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
66000000
Answer: 6.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 35°. Find adjacent side
Answer: 19.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 23. If 5 of them are 33, 45, 49, 19, 25, what is the missing number?
Answer: -33