Keystones — Lintel
Five GCSE retrieval questions · 23 April 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
7600000
Answer: 7.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 38°. Find opposite
Answer: 10.9cm -
4. Ratio Mixed ratio problems
Divide 100 in the ratio 3:4:3
Answer: 30, 40 and 30 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 17, 24, 30, 41, 18, what is the missing number?
Answer: 32