Keystones — Lintel
Five GCSE retrieval questions · 21 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
400000
Answer: 4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 25°. Find adjacent side
Answer: 25.4cm -
4. Ratio Mixed ratio problems
£210.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
The mean of 6 numbers is 24. If 5 of them are 30, 26, 47, 22, 46, what is the missing number?
Answer: -27