Keystones — Lintel
Five GCSE retrieval questions · 25 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
53000000
Answer: 5.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 36°. Find adjacent side
Answer: 13.8cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 37. If 5 of them are 39, 36, 48, 37, 18, what is the missing number?
Answer: 44