Keystones — Lintel
Five GCSE retrieval questions · 29 December 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.002 in standard form
Answer: 2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 44
Answer: (x + 11)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.54cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 hours : 45 minutes
Answer: 16:3 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 39, 19, 28, what is the missing number?
Answer: 18