Keystones — Lintel
Five GCSE retrieval questions · 9 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
27000000
Answer: 2.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 44°. Find adjacent side
Answer: 21.6cm -
4. Ratio Mixed ratio problems
Divide 260 in the ratio 4:3:3
Answer: 104, 78 and 78 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 20, 34, 39, what is the missing number?
Answer: 43