Keystones — Lintel
Five GCSE retrieval questions · 9 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 9,400,000 in standard form
Answer: 9.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.31cm -
4. Ratio Mixed ratio problems
Orange, purple and pink sweets are in the ratio 10:3:3. What fraction of the sweets are pink?
Answer: 3⁄16 -
5. Statistics Mean
Calculate the mean of: 48, 43, 23, 14, 31, 37. Give your answer to 2 decimal places
Answer: 32.67