Keystones — Lintel
Five GCSE retrieval questions · 22 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
110000
Answer: 1.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 59°. Find adjacent side
Answer: 17cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 28, 17, 26, 15, 15, what is the missing number?
Answer: 91