Keystones — Lintel
Five GCSE retrieval questions · 10 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0005
Answer: 5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 60°. Find opposite
Answer: 38.cm -
4. Ratio Mixed ratio problems
Divide 153 in the ratio 4:3:2
Answer: 68, 51 and 34 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 42, 42, 24, 40, what is the missing number?
Answer: 27