Keystones — Lintel
Five GCSE retrieval questions · 20 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
630000
Answer: 6.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 47°. Find opposite
Answer: 13.9cm -
4. Ratio Mixed ratio problems
Divide 119 in the ratio 2:1:4
Answer: 34, 17 and 68 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 22, 25, 19, 41, what is the missing number?
Answer: 28