Keystones — Lintel
Five GCSE retrieval questions · 25 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
29000000
Answer: 2.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 35°. Find adjacent side
Answer: 29.5cm -
4. Ratio Mixed ratio problems
Divide 154 in the ratio 2:1:4
Answer: 44, 22 and 88 -
5. Statistics Mean
The mean of 5 numbers is 28. If 4 of them are 49, 27, 34, 32, what is the missing number?
Answer: -2