Keystones — Lintel
Five GCSE retrieval questions · 7 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
530000
Answer: 5.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 31°. Find opposite
Answer: 10.2cm -
4. Ratio Mixed ratio problems
Simplify: 4:6:12
Answer: 2:3:6 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 26, 33, 32, 19, what is the missing number?
Answer: 50