Keystones — Lintel
Five GCSE retrieval questions · 3 February 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
7900000
Answer: 7.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 30°. Find adjacent side
Answer: 31.2cm -
4. Ratio Mixed ratio problems
Divide 243 in the ratio 3:2:4
Answer: 81, 54 and 108 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 46, 44, 38, what is the missing number?
Answer: -28