Keystones — Lintel
Five GCSE retrieval questions · 8 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0063
Answer: 6.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 26°. Find adjacent side
Answer: 18cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 28. If 3 of them are 34, 44, 18, what is the missing number?
Answer: 16