Keystones — Lintel
Five GCSE retrieval questions · 24 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.085
Answer: 8.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 54°. Find opposite
Answer: 35.8cm -
4. Ratio Mixed ratio problems
£175.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £125.00 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 29, 42, 19, 45, what is the missing number?
Answer: 25