Keystones — Lintel
Five GCSE retrieval questions · 11 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 910,000 in standard form
Answer: 9.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 132
Answer: (x + 12)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 52°. Find opposite. Give your answer to 2 decimal places
Answer: 29.44cm -
4. Ratio Mixed ratio problems
Simplify: 4:4:10
Answer: 2:2:5 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 16, 21, 25, what is the missing number?
Answer: 30