Keystones — Lintel
Five GCSE retrieval questions · 8 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,100,000 in standard form
Answer: 6.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.51cm -
4. Ratio Mixed ratio problems
Simplify the ratio £2 : 75p
Answer: 8:3 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 31, 38, 36, 38, what is the missing number?
Answer: 37