Keystones — Lintel
Five GCSE retrieval questions · 1 June 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0073
Answer: 7.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 58°. Find opposite
Answer: 30.4cm -
4. Ratio Mixed ratio problems
£180.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £80.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 23, 43, 30, what is the missing number?
Answer: 28