Keystones — Lintel
Five GCSE retrieval questions · 8 August 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
14000000
Answer: 1.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 60°. Find adjacent side
Answer: 15cm -
4. Ratio Mixed ratio problems
£168.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
The mean of 6 numbers is 22. If 5 of them are 38, 33, 19, 25, 49, what is the missing number?
Answer: -32