Keystones — Lintel
Five GCSE retrieval questions · 25 February 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 29,000 in standard form
Answer: 2.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 32
Answer: (x + 4)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.79cm -
4. Ratio Mixed ratio problems
Orange, purple and pink counters are in the ratio 5:4:2. What fraction of the counters are pink?
Answer: 2⁄11 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 46, 50, 25, 28, what is the missing number?
Answer: 26