Keystones — Lintel
Five GCSE retrieval questions · 14 May 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.062
Answer: 6.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 29°. Find adjacent side
Answer: 27.cm -
4. Ratio Mixed ratio problems
Simplify: 10:12:8
Answer: 5:6:4 -
5. Statistics Mean
The mean of 4 numbers is 24. If 3 of them are 50, 32, 43, what is the missing number?
Answer: -29