Keystones — Lintel
Five GCSE retrieval questions · 29 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,000,000 in standard form
Answer: 5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 30
Answer: (x + 10)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 20.8cm -
4. Ratio Mixed ratio problems
Simplify: 24:8:16
Answer: 3:1:2 -
5. Statistics Mean
The mean of 4 numbers is 28. If 3 of them are 42, 24, 37, what is the missing number?
Answer: 9