Keystones — Lintel
Five GCSE retrieval questions · 25 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.089
Answer: 8.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 55°. Find opposite
Answer: 15.7cm -
4. Ratio Mixed ratio problems
£132.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £88.00 -
5. Statistics Mean
The mean of 5 numbers is 23. If 4 of them are 15, 18, 17, 21, what is the missing number?
Answer: 44