Keystones — Lintel
Five GCSE retrieval questions · 19 May 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 310,000 in standard form
Answer: 3.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 60
Answer: (x + 10)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 35.58cm -
4. Ratio Mixed ratio problems
Divide 182 in the ratio 4:1:2
Answer: 104, 26 and 52 -
5. Statistics Mean
The mean of 6 numbers is 40. If 5 of them are 44, 47, 31, 25, 36, what is the missing number?
Answer: 57