Keystones — Lintel
Five GCSE retrieval questions · 26 March 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
48000000
Answer: 4.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 36
Answer: (x - 6)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 55°. Find opposite
Answer: 30cm -
4. Ratio Mixed ratio problems
In ratio 1:1:3, what fraction is the second part?
Answer: 1⁄5 -
5. Statistics Mean
The mean of 5 numbers is 24. If 4 of them are 16, 26, 17, 34, what is the missing number?
Answer: 27