Keystones — Lintel
Five GCSE retrieval questions · 22 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0027
Answer: 2.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 61°. Find adjacent side
Answer: 15cm -
4. Ratio Mixed ratio problems
Simplify: 8:16:24
Answer: 1:2:3 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 34, 24, 26, what is the missing number?
Answer: 20