Keystones — Lintel
Five GCSE retrieval questions · 6 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
98000000
Answer: 9.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 41°. Find adjacent side
Answer: 22.6cm -
4. Ratio Mixed ratio problems
£351.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £156.00 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 45, 47, 48, 45, what is the missing number?
Answer: -5