Keystones — Lintel
Five GCSE retrieval questions · 11 July 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
24000000
Answer: 2.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 56°. Find adjacent side
Answer: 20.7cm -
4. Ratio Mixed ratio problems
Express the first part of 5:3 as a fraction in simplest form
Answer: 5⁄8 -
5. Statistics Mean
The mean of 6 numbers is 28. If 5 of them are 19, 19, 49, 36, 43, what is the missing number?
Answer: 2