Keystones — Lintel
Five GCSE retrieval questions · 9 January 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
99000000
Answer: 9.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 45°. Find opposite
Answer: 25cm -
4. Ratio Mixed ratio problems
Divide 225 in the ratio 2:4:3
Answer: 50, 100 and 75 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 50, 22, 38, 41, 28, what is the missing number?
Answer: -17