Keystones — Lintel
Five GCSE retrieval questions · 22 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
5500000
Answer: 5.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 44°. Find opposite
Answer: 23.2cm -
4. Ratio Mixed ratio problems
Divide 135 in the ratio 2:1:2
Answer: 54, 27 and 54 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 29, 47, 17, what is the missing number?
Answer: 63