Keystones — Lintel
Five GCSE retrieval questions · 7 August 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
480000
Answer: 4.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 42°. Find adjacent side
Answer: 26.8cm -
4. Ratio Mixed ratio problems
£279.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £155.00 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 34, 40, 29, 27, what is the missing number?
Answer: 55