Keystones — Lintel
Five GCSE retrieval questions · 8 October 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 56,000 in standard form
Answer: 5.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 13x + 12
Answer: (x + 12)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.79cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 litres : 50 ml
Answer: 40:1 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 16, 43, 26, what is the missing number?
Answer: 23