Keystones — Lintel
Five GCSE retrieval questions · 21 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
7200000
Answer: 7.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 43°. Find opposite
Answer: 26.cm -
4. Ratio Mixed ratio problems
£273.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £117.00 -
5. Statistics Mean
The mean of 6 numbers is 23. If 5 of them are 34, 20, 16, 43, 27, what is the missing number?
Answer: -2