Keystones — Lintel
Five GCSE retrieval questions · 8 August 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 80,000 in standard form
Answer: 8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 30
Answer: (x - 3)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.67cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:6
Answer: 2:1:1 -
5. Statistics Mean
The mean of 4 numbers is 22. If 3 of them are 20, 21, 21, what is the missing number?
Answer: 26