Keystones — Lintel
Five GCSE retrieval questions · 13 October 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
20000
Answer: 2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 25°. Find adjacent side
Answer: 22.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 20. If 5 of them are 32, 29, 21, 16, 23, what is the missing number?
Answer: -1