Keystones — Lintel
Five GCSE retrieval questions · 24 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
790000
Answer: 7.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 33°. Find adjacent side
Answer: 16.8cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 21. If 3 of them are 15, 37, 34, what is the missing number?
Answer: -2