Keystones — Lintel
Five GCSE retrieval questions · 21 February 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.00097
Answer: 9.7 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 29°. Find adjacent side
Answer: 14cm -
4. Ratio Mixed ratio problems
Express the first part of 4:2 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 42, 46, 26, what is the missing number?
Answer: 6