Keystones — Lintel
Five GCSE retrieval questions · 25 June 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.0027
Answer: 2.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 43°. Find opposite
Answer: 18.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 15, 28, 16, 34, what is the missing number?
Answer: 97