Keystones — Lintel
Five GCSE retrieval questions · 1 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.078
Answer: 7.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 47°. Find opposite
Answer: 29cm -
4. Ratio Mixed ratio problems
£272.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £170.00 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 48, 35, 20, what is the missing number?
Answer: -3