Keystones — Lintel
Five GCSE retrieval questions · 1 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
19000
Answer: 1.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 39°. Find opposite
Answer: 8.cm -
4. Ratio Mixed ratio problems
Simplify: 10:4:8
Answer: 5:2:4 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 26, 31, 49, what is the missing number?
Answer: -6