Keystones — Lintel
Five GCSE retrieval questions · 15 April 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 500,000,000 in standard form
Answer: 5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 44
Answer: (x + 11)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 13.27cm -
4. Ratio Mixed ratio problems
Divide 162 in the ratio 3:2:4
Answer: 54, 36 and 72 -
5. Statistics Mean
Calculate the mean of: 21, 17, 43, 20, 20, 34, 30, 14. Give your answer to 2 decimal places
Answer: 24.88