Keystones — Lintel
Five GCSE retrieval questions · 28 November 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 - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 29°. Find adjacent side
Answer: 14cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £80.00 -
5. Statistics Mean
The mean of 4 numbers is 20. If 3 of them are 15, 30, 38, what is the missing number?
Answer: -3