Keystones — Lintel
Five GCSE retrieval questions · 27 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00075
Answer: 7.5 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 37°. Find opposite
Answer: 12.8cm -
4. Ratio Mixed ratio problems
£259.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £185.00 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 34, 24, 39, 43, what is the missing number?
Answer: 5