Keystones — Lintel
Five GCSE retrieval questions · 27 May 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,400,000 in standard form
Answer: 4.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.05cm -
4. Ratio Mixed ratio problems
Black, white and yellow beads are in the ratio 11:10:8. What fraction of the beads are black?
Answer: 11⁄29 -
5. Statistics Mean
The mean of 4 numbers is 28. If 3 of them are 44, 17, 33, what is the missing number?
Answer: 18