Keystones — Lintel
Five GCSE retrieval questions · 14 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.042
Answer: 4.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 53°. Find adjacent side
Answer: 9cm -
4. Ratio Mixed ratio problems
Simplify: 6:10:10
Answer: 3:5:5 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 18, 45, 29, what is the missing number?
Answer: 48