Keystones — Lintel
Five GCSE retrieval questions · 21 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
5600000
Answer: 5.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 61°. Find adjacent side
Answer: 10.2cm -
4. Ratio Mixed ratio problems
Simplify: 12:18:15
Answer: 4:6:5 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 16, 24, 30, 18, 46, what is the missing number?
Answer: 94