Keystones — Lintel
Five GCSE retrieval questions · 17 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
47000
Answer: 4.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 53°. Find opposite
Answer: 31.8cm -
4. Ratio Mixed ratio problems
Simplify: 6:4:8
Answer: 3:2:4 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 47, 42, 23, what is the missing number?
Answer: 20