Keystones — Lintel
Five GCSE retrieval questions · 17 March 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00033 in standard form
Answer: 3.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 24
Answer: (x - 2)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places
Answer: 32.97cm -
4. Ratio Mixed ratio problems
Simplify the ratio 9m : 60cm
Answer: 15:1 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 25, 15, 40, what is the missing number?
Answer: 52