Keystones — Lintel
Five GCSE retrieval questions · 16 June 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.025
Answer: 2.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 58°. Find adjacent side
Answer: 18.5cm -
4. Ratio Mixed ratio problems
Divide 52 in the ratio 2:1:1
Answer: 26, 13 and 13 -
5. Statistics Mean
The mean of 6 numbers is 21. If 5 of them are 30, 30, 46, 32, 30, what is the missing number?
Answer: -42