Keystones — Lintel
Five GCSE retrieval questions · 6 May 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 83,000 in standard form
Answer: 8.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 10
Answer: (x + 10)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 14.58cm -
4. Ratio Mixed ratio problems
Simplify the ratio £9 : 55p
Answer: 180:11 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 42, 34, 21, what is the missing number?
Answer: 35