Keystones — Lintel
Five GCSE retrieval questions · 5 September 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 1,100,000 in standard form
Answer: 1.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 55
Answer: (x + 11)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 18.12cm -
4. Ratio Mixed ratio problems
Simplify: 8:6:8
Answer: 4:3:4 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 36, 29, 18, 24, 32, what is the missing number?
Answer: 17