Keystones — Lintel
Five GCSE retrieval questions · 8 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
26000
Answer: 2.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 26°. Find adjacent side
Answer: 28.8cm -
4. Ratio Mixed ratio problems
Divide 77 in the ratio 2:1:4
Answer: 22, 11 and 44 -
5. Statistics Mean
The mean of 5 numbers is 23. If 4 of them are 34, 29, 23, 17, what is the missing number?
Answer: 12