Keystones — Lintel
Five GCSE retrieval questions · 3 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
4300000
Answer: 4.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 34°. Find opposite
Answer: 14.8cm -
4. Ratio Mixed ratio problems
Divide 135 in the ratio 2:1:2
Answer: 54, 27 and 54 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 28, 21, 22, 43, 15, what is the missing number?
Answer: 99