Keystones — Lintel
Five GCSE retrieval questions · 8 April 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.004 in standard form
Answer: 4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 132
Answer: (x + 11)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 29.99cm -
4. Ratio Mixed ratio problems
Simplify the ratio £3 : 55p
Answer: 60:11 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 47, 24, 40, 38, what is the missing number?
Answer: 21