Keystones — Lintel
Five GCSE retrieval questions · 8 April 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
810000
Answer: 8.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 31°. Find opposite
Answer: 15.6cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 2:2:3
Answer: 48, 48 and 72 -
5. Statistics Mean
The mean of 6 numbers is 20. If 5 of them are 37, 43, 50, 38, 16, what is the missing number?
Answer: -64