Keystones — Lintel
Five GCSE retrieval questions · 15 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
76000000
Answer: 7.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 37°. Find opposite
Answer: 16.6cm -
4. Ratio Mixed ratio problems
£350.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £200.00 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 28, 47, 18, 17, what is the missing number?
Answer: 35