Keystones — Lintel
Five GCSE retrieval questions · 13 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
36000000
Answer: 3.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 50°. Find opposite
Answer: 13.cm -
4. Ratio Mixed ratio problems
Simplify: 16:20:24
Answer: 4:5:6 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 19, 39, 49, what is the missing number?
Answer: 17