Keystones — Lintel
Five GCSE retrieval questions · 10 December 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.0023
Answer: 2.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 40°. Find opposite
Answer: 18.5cm -
4. Ratio Mixed ratio problems
Divide 207 in the ratio 1:4:4
Answer: 23, 92 and 92 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 49, 20, 17, 25, what is the missing number?
Answer: 74