Keystones — Lintel
Five GCSE retrieval questions · 21 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
1300000
Answer: 1.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 65°. Find adjacent side
Answer: 10.cm -
4. Ratio Mixed ratio problems
Divide 231 in the ratio 4:4:3
Answer: 84, 84 and 63 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 49, 36, 27, what is the missing number?
Answer: -20