Keystones — Lintel
Five GCSE retrieval questions · 20 February 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 920,000 in standard form
Answer: 9.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x - 10
Answer: (x + 1)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24cm -
4. Ratio Mixed ratio problems
Divide 96 in the ratio 4:1:1
Answer: 64, 16 and 16 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 46, 43, 16, what is the missing number?
Answer: 51