Keystones — Lintel
Five GCSE retrieval questions · 26 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
7200000
Answer: 7.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 39°. Find opposite
Answer: 20.2cm -
4. Ratio Mixed ratio problems
Divide 225 in the ratio 4:1:4
Answer: 100, 25 and 100 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 21, 34, 34, 40, what is the missing number?
Answer: 51