Keystones — Lintel
Five GCSE retrieval questions · 6 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00019
Answer: 1.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 32°. Find adjacent side
Answer: 28cm -
4. Ratio Mixed ratio problems
£186.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £62.00 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 27, 42, 17, 30, 18, what is the missing number?
Answer: 22