Keystones — Lintel
Five GCSE retrieval questions · 28 June 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 780,000 in standard form
Answer: 7.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 24
Answer: (x + 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.36cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 litres : 850 ml
Answer: 100:17 -
5. Statistics Mean
Calculate the mean of: 46, 49, 31, 21, 35, 45, 31. Give your answer to 2 decimal places
Answer: 36.86