Keystones — Lintel
Five GCSE retrieval questions · 21 May 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0033 in standard form
Answer: 3.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 18.83cm -
4. Ratio Mixed ratio problems
Simplify: 16:12:16
Answer: 4:3:4 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 40, 30, 49, 29, what is the missing number?
Answer: 47