Keystones — Lintel
Five GCSE retrieval questions · 2 September 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
220000
Answer: 2.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 16
Answer: (x - 4)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 52°. Find adjacent side
Answer: 12.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 27, 20, 45, what is the missing number?
Answer: 28