Keystones — Lintel
Five GCSE retrieval questions · 26 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0014
Answer: 1.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 50°. Find opposite
Answer: 26.2cm -
4. Ratio Mixed ratio problems
Divide 152 in the ratio 3:2:3
Answer: 57, 38 and 57 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 41, 33, 43, 15, what is the missing number?
Answer: 13