Keystones — Lintel
Five GCSE retrieval questions · 25 March 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 - 14x + 33
Answer: (x - 3)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.41cm -
4. Ratio Mixed ratio problems
Simplify: 4:8:8
Answer: 1:2:2 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 36, 41, 30, 27, what is the missing number?
Answer: 11