Keystones — Lintel
Five GCSE retrieval questions · 7 February 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
540000
Answer: 5.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 54°. Find adjacent side
Answer: 15.3cm -
4. Ratio Mixed ratio problems
Simplify: 12:9:18
Answer: 4:3:6 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 24, 34, 30, what is the missing number?
Answer: 48