Keystones — Lintel
Five GCSE retrieval questions · 25 October 2016 · 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 - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 22.56cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 3:1:4
Answer: 81, 27 and 108 -
5. Statistics Mean
Calculate the mean of: 41, 17, 11, 33, 49, 12, 32, 27
Answer: 27.75