Keystones — Lintel
Five GCSE retrieval questions · 21 June 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000058 in standard form
Answer: 5.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 16
Answer: (x - 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 32.23cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4kg : 150g
Answer: 80:3 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 24, 28, 35, what is the missing number?
Answer: 37