Keystones — Lintel
Five GCSE retrieval questions · 8 July 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 5,500,000 in standard form
Answer: 5.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 21
Answer: (x + 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 35.83cm -
4. Ratio Mixed ratio problems
£170.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £102.00 -
5. Statistics Mean
Calculate the mean of: 21, 32, 18, 38, 14, 28, 31
Answer: 26