Keystones — Lintel
Five GCSE retrieval questions · 23 May 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.016 in standard form
Answer: 1.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 24
Answer: (x + 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.85cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 hours : 10 minutes
Answer: 18:1 -
5. Statistics Mean
The mean of 4 numbers is 22. If 3 of them are 23, 16, 25, what is the missing number?
Answer: 24