Keystones — Lintel
Five GCSE retrieval questions · 18 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
8400000
Answer: 8.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 43°. Find opposite
Answer: 22.4cm -
4. Ratio Mixed ratio problems
Divide 126 in the ratio 3:3:1
Answer: 54, 54 and 18 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 25, 22, 18, what is the missing number?
Answer: 83