Keystones — Lintel
Five GCSE retrieval questions · 5 April 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 750,000 in standard form
Answer: 7.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 50
Answer: (x + 5)(x - 10) -
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 162 in the ratio 1:4:1
Answer: 27, 108 and 27 -
5. Statistics Mean
The mean of 6 numbers is 39. If 5 of them are 32, 24, 50, 43, 26, what is the missing number?
Answer: 59