Keystones — Lintel
Five GCSE retrieval questions · 28 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0097
Answer: 9.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 54°. Find opposite
Answer: 15.cm -
4. Ratio Mixed ratio problems
Simplify: 4:12:6
Answer: 2:6:3 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 20, 36, 45, what is the missing number?
Answer: 31