Keystones — Lintel
Five GCSE retrieval questions · 21 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
41000000
Answer: 4.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 39°. Find opposite
Answer: 18.6cm -
4. Ratio Mixed ratio problems
Simplify: 18:6:12
Answer: 3:1:2 -
5. Statistics Mean
The mean of 6 numbers is 35. If 5 of them are 18, 26, 25, 31, 34, what is the missing number?
Answer: 76