Keystones — Lintel
Five GCSE retrieval questions · 14 June 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
180000
Answer: 1.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 52°. Find opposite
Answer: 24.3cm -
4. Ratio Mixed ratio problems
£344.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £215.00 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 28, 49, 16, what is the missing number?
Answer: 67