Keystones — Lintel
Five GCSE retrieval questions · 19 January 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
370000
Answer: 3.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 46°. Find opposite
Answer: 19.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 33, 29, 24, 43, 47, what is the missing number?
Answer: 4