Keystones — Lintel
Five GCSE retrieval questions · 23 December 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.033
Answer: 3.3 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 64°. Find adjacent side
Answer: 12.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 47, 24, 35, what is the missing number?
Answer: 2