Keystones — Lintel
Five GCSE retrieval questions · 16 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,600,000 in standard form
Answer: 7.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.01cm -
4. Ratio Mixed ratio problems
Red and blue beads are in the ratio 11:8. What fraction of the beads are blue?
Answer: 8⁄19 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 26, 38, 44, what is the missing number?
Answer: 20