Keystones — Lintel
Five GCSE retrieval questions · 12 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00059
Answer: 5.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 51°. Find opposite
Answer: 12.3cm -
4. Ratio Mixed ratio problems
£196.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £140.00 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 37, 22, 20, 15, 20, what is the missing number?
Answer: 42