Keystones — Lintel
Five GCSE retrieval questions · 29 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.024
Answer: 2.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 33°. Find opposite
Answer: 8.4cm -
4. Ratio Mixed ratio problems
Simplify: 8:12:24
Answer: 2:3:6 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 47, 40, 43, what is the missing number?
Answer: -10