Keystones — Lintel
Five GCSE retrieval questions · 12 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
54000
Answer: 5.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 50°. Find adjacent side
Answer: 9.6cm -
4. Ratio Mixed ratio problems
Divide 156 in the ratio 2:1:3
Answer: 52, 26 and 78 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 25, 49, 49, 35, 46, what is the missing number?
Answer: -30