Keystones — Lintel
Five GCSE retrieval questions · 20 July 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 62,000 in standard form
Answer: 6.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 8
Answer: (x + 1)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.36cm -
4. Ratio Mixed ratio problems
In ratio 7:7:11, what fraction is the third part?
Answer: 11⁄25 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 49, 21, 15, 44, what is the missing number?
Answer: 46