Keystones — Lintel
Five GCSE retrieval questions · 29 April 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0059
Answer: 5.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 33°. Find adjacent side
Answer: 33.5cm -
4. Ratio Mixed ratio problems
Simplify: 6:9:15
Answer: 2:3:5 -
5. Statistics Mean
The mean of 4 numbers is 24. If 3 of them are 38, 28, 44, what is the missing number?
Answer: -14