Keystones — Lintel
Five GCSE retrieval questions · 10 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,500,000 in standard form
Answer: 4.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.46cm -
4. Ratio Mixed ratio problems
Orange, purple and pink beads are in the ratio 11:10:7. What fraction of the beads are pink?
Answer: 1⁄4 -
5. Statistics Mean
The mean of 5 numbers is 24. If 4 of them are 18, 22, 44, 22, what is the missing number?
Answer: 14