Keystones — Lintel
Five GCSE retrieval questions · 9 December 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 75,000 in standard form
Answer: 7.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 18
Answer: (x + 9)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 10.62cm -
4. Ratio Mixed ratio problems
Divide 176 in the ratio 3:4:4
Answer: 48, 64 and 64 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 16, 42, 33, 29, what is the missing number?
Answer: 50