Keystones — Lintel
Five GCSE retrieval questions · 14 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
51000000
Answer: 5.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 59°. Find adjacent side
Answer: 20.cm -
4. Ratio Mixed ratio problems
£368.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £138.00 -
5. Statistics Mean
The mean of 6 numbers is 31. If 5 of them are 35, 43, 27, 37, 46, what is the missing number?
Answer: -2