Keystones — Lintel
Five GCSE retrieval questions · 3 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0049
Answer: 4.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 36°. Find opposite
Answer: 14.5cm -
4. Ratio Mixed ratio problems
Divide 207 in the ratio 2:3:4
Answer: 46, 69 and 92 -
5. Statistics Mean
The mean of 6 numbers is 37. If 5 of them are 32, 29, 30, 18, 15, what is the missing number?
Answer: 98