Keystones — Lintel
Five GCSE retrieval questions · 15 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00043
Answer: 4.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 51°. Find adjacent side
Answer: 17cm -
4. Ratio Mixed ratio problems
£336.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 16, 32, 23, 27, 35, what is the missing number?
Answer: 65