Keystones — Lintel
Five GCSE retrieval questions · 9 September 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
82000000
Answer: 8.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 53°. Find opposite
Answer: 33.2cm -
4. Ratio Mixed ratio problems
Divide 112 in the ratio 2:3:3
Answer: 28, 42 and 42 -
5. Statistics Mean
Calculate the mean of: 21, 40, 25, 34, 18, 15, 38, 13
Answer: 25.5