Keystones — Lintel
Five GCSE retrieval questions · 25 December 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
750000
Answer: 7.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 46°. Find opposite
Answer: 29cm -
4. Ratio Mixed ratio problems
Express the first part of 5:4 as a fraction in simplest form
Answer: 5⁄9 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 36, 31, 33, 26, 21, what is the missing number?
Answer: 69