Keystones — Lintel
Five GCSE retrieval questions · 6 December 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00069 in standard form
Answer: 6.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x + 15
Answer: (x + 5)(x + 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.66cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 600g
Answer: 5:3 -
5. Statistics Mean
Calculate the mean of: 37, 9, 18, 42, 25, 41, 17, 45
Answer: 29.25