Keystones — Lintel
Five GCSE retrieval questions · 15 August 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000025 in standard form
Answer: 2.5 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 40°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.28cm -
4. Ratio Mixed ratio problems
£333.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £148.00 -
5. Statistics Mean
Calculate the mean of: 17, 20, 5, 38, 24, 24. Give your answer to 2 decimal places
Answer: 21.33