Keystones — Lintel
Five GCSE retrieval questions · 20 July 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.07
Answer: 7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 40°. Find adjacent side
Answer: 26.8cm -
4. Ratio Mixed ratio problems
Divide 176 in the ratio 3:1:4
Answer: 66, 22 and 88 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 35, 16, 25, 23, what is the missing number?
Answer: 96