Keystones — Lintel
Five GCSE retrieval questions · 1 January 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 69,000,000 in standard form
Answer: 6.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 23x + 132
Answer: (x - 11)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.55cm -
4. Ratio Mixed ratio problems
Simplify the ratio £3 : 35p
Answer: 60:7 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 16, 48, 22, what is the missing number?
Answer: 38