Keystones — Lintel
Five GCSE retrieval questions · 2 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.011
Answer: 1.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 38°. Find opposite
Answer: 21.9cm -
4. Ratio Mixed ratio problems
Divide 182 in the ratio 4:2:1
Answer: 104, 52 and 26 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 35, 32, 24, what is the missing number?
Answer: 1