Keystones — Lintel
Five GCSE retrieval questions · 21 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 1,300,000 in standard form
Answer: 1.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 66
Answer: (x + 11)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.31cm -
4. Ratio Mixed ratio problems
Divide 200 in the ratio 2:1:1
Answer: 100, 50 and 50 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 47, 46, 38, 29, what is the missing number?
Answer: 25