Keystones — Lintel
Five GCSE retrieval questions · 15 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
47000
Answer: 4.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 45°. Find adjacent side
Answer: 24.7cm -
4. Ratio Mixed ratio problems
Divide 196 in the ratio 3:3:1
Answer: 84, 84 and 28 -
5. Statistics Mean
The mean of 4 numbers is 28. If 3 of them are 48, 49, 42, what is the missing number?
Answer: -27