Keystones — Lintel
Five GCSE retrieval questions · 12 July 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 52,000 in standard form
Answer: 5.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 24
Answer: (x + 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.75cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 1:4:3
Answer: 21, 84 and 63 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 39, 36, 27, 42, what is the missing number?
Answer: 41