Keystones — Lintel
Five GCSE retrieval questions · 3 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
120000
Answer: 1.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 58°. Find opposite
Answer: 40cm -
4. Ratio Mixed ratio problems
£156.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £52.00 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 34, 26, 49, 17, 42, what is the missing number?
Answer: -12