Keystones — Lintel
Five GCSE retrieval questions · 30 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
79000
Answer: 7.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 29°. Find adjacent side
Answer: 23.6cm -
4. Ratio Mixed ratio problems
Simplify: 16:12:16
Answer: 4:3:4 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 42, 24, 25, 24, what is the missing number?
Answer: 85