Keystones — Lintel
Five GCSE retrieval questions · 18 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
550000
Answer: 5.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 21
Answer: (x + 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 59°. Find opposite
Answer: 38.3cm -
4. Ratio Mixed ratio problems
£308.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £220.00 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 20, 20, 35, 31, 34, what is the missing number?
Answer: 16