Keystones — Lintel
Five GCSE retrieval questions · 14 January 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
32000000
Answer: 3.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 47°. Find adjacent side
Answer: 11.6cm -
4. Ratio Mixed ratio problems
Simplify: 12:12:20
Answer: 3:3:5 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 29, 19, 31, what is the missing number?
Answer: 21