Keystones — Lintel
Five GCSE retrieval questions · 25 October 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
980000
Answer: 9.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 40°. Find adjacent side
Answer: 21.4cm -
4. Ratio Mixed ratio problems
Simplify: 12:8:4
Answer: 3:2:1 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 35, 44, 28, 33, 24, what is the missing number?
Answer: 40