Keystones — Lintel
Five GCSE retrieval questions · 23 April 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00033
Answer: 3.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 34°. Find adjacent side
Answer: 25.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 35, 33, 30, 46, 47, what is the missing number?
Answer: 25