Keystones — Lintel
Five GCSE retrieval questions · 11 May 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.00091
Answer: 9.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 60°. Find opposite
Answer: 20.8cm -
4. Ratio Mixed ratio problems
Divide 200 in the ratio 1:3:4
Answer: 25, 75 and 100 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 22, 48, 33, what is the missing number?
Answer: 57