Keystones — Lintel
Five GCSE retrieval questions · 3 March 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.0053
Answer: 5.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 24
Answer: (x + 8)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 29°. Find adjacent side
Answer: 21cm -
4. Ratio Mixed ratio problems
In ratio 4:1:3, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 15, 46, 25, 26, what is the missing number?
Answer: 83