Keystones — Lintel
Five GCSE retrieval questions · 23 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
25000000
Answer: 2.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 53°. Find adjacent side
Answer: 24.cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 37, 34, 20, what is the missing number?
Answer: 53