Keystones — Lintel
Five GCSE retrieval questions · 8 May 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0002 in standard form
Answer: 2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.55cm -
4. Ratio Mixed ratio problems
£140.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
Calculate the mean of: 41, 31, 34, 40, 21, 13
Answer: 30