Keystones — Lintel
Five GCSE retrieval questions · 18 March 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 88,000 in standard form
Answer: 8.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x - 11
Answer: (x + 11)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.91cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 hours : 55 minutes
Answer: 60:11 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 26, 31, 25, 41, 48, what is the missing number?
Answer: 9