Keystones — Lintel
Five GCSE retrieval questions · 29 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
920000
Answer: 9.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 58°. Find opposite
Answer: 41.6cm -
4. Ratio Mixed ratio problems
Simplify: 4:10:6
Answer: 2:5:3 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 29, 24, 34, what is the missing number?
Answer: 69