Keystones — Lintel
Five GCSE retrieval questions · 16 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 41,000 in standard form
Answer: 4.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 36
Answer: (x - 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.49cm -
4. Ratio Mixed ratio problems
Orange and purple sweets are in the ratio 4:12. What fraction of the sweets are orange?
Answer: 1⁄4 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 50, 26, 19, what is the missing number?
Answer: 33