Keystones — Lintel
Five GCSE retrieval questions · 30 October 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00072 in standard form
Answer: 7.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 18x + 80
Answer: (x - 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 35.75cm -
4. Ratio Mixed ratio problems
Divide 290 in the ratio 3:3:4
Answer: 87, 87 and 116 -
5. Statistics Mean
Calculate the mean of: 18, 34, 11, 44, 50, 47, 41, 12. Give your answer to 2 decimal places
Answer: 32.13