Keystones — Lintel
Five GCSE retrieval questions · 30 August 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
31000
Answer: 3.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 37°. Find adjacent side
Answer: 24.8cm -
4. Ratio Mixed ratio problems
£350.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
The mean of 6 numbers is 31. If 5 of them are 20, 17, 42, 27, 30, what is the missing number?
Answer: 50