Keystones — Lintel
Five GCSE retrieval questions · 20 May 2023 · mathsvault.uk/keystones
-
1. Number
What is the missing number: 31 + ? = 167
Answer: 136 -
2. Algebra
Factorise fully: 25x² + 30x
Answer: 5x(5x + 6) -
3. Geometry
Opposite = 14cm, adjacent = 14cm. Calculate the angle
Answer: 45° -
4. Ratio
Calculate 25.7% of 383
Answer: 98.43 -
5. Statistics
A bag has 4 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 1⁄3