Keystones — Lintel
Five GCSE retrieval questions · 3 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00044
Answer: 4.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 58°. Find adjacent side
Answer: 13.2cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 35, 39, 49, 25, 36, what is the missing number?
Answer: 8