Keystones — Lintel
Five GCSE retrieval questions · 31 January 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.0077
Answer: 7.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 47°. Find opposite
Answer: 31.cm -
4. Ratio Mixed ratio problems
Simplify: 4:6:10
Answer: 2:3:5 -
5. Statistics Mean
The mean of 5 numbers is 21. If 4 of them are 24, 15, 38, 27, what is the missing number?
Answer: 1