Keystones — Lintel
Five GCSE retrieval questions · 2 June 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 98,000 in standard form
Answer: 9.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 17x + 72
Answer: (x + 9)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.14cm -
4. Ratio Mixed ratio problems
Divide 80 in the ratio 1:3:4
Answer: 10, 30 and 40 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 28, 22, 35, what is the missing number?
Answer: 23