Keystones — Lintel
Five GCSE retrieval questions · 25 August 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000013 in standard form
Answer: 1.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 29.64cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4kg : 100g
Answer: 40:1 -
5. Statistics Mean
Calculate the mean of: 23, 39, 10, 10, 46, 5. Give your answer to 2 decimal places
Answer: 22.17