Keystones — Lintel
Five GCSE retrieval questions · 13 May 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.0094
Answer: 9.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 36°. Find opposite
Answer: 13.8cm -
4. Ratio Mixed ratio problems
Express the first part of 2:3 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 29, 24, 17, what is the missing number?
Answer: 66