Keystones — Lintel
Five GCSE retrieval questions · 29 May 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.054 in standard form
Answer: 5.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.9cm -
4. Ratio Mixed ratio problems
Orange and purple beads are in the ratio 8:6. What fraction of the beads are purple?
Answer: 3⁄7 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 46, 17, 49, 39, 32, what is the missing number?
Answer: 33