Keystones — Lintel
Five GCSE retrieval questions · 21 November 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.00093
Answer: 9.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 52°. Find opposite
Answer: 21.8cm -
4. Ratio Mixed ratio problems
Divide 135 in the ratio 4:4:1
Answer: 60, 60 and 15 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 36, 38, 47, 33, 20, what is the missing number?
Answer: 42