Keystones — Lintel
Five GCSE retrieval questions · 21 November 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
570000
Answer: 5.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 59°. Find adjacent side
Answer: 19.6cm -
4. Ratio Mixed ratio problems
In ratio 2:4:4, what fraction is the second part?
Answer: 4⁄10 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 29, 18, 34, what is the missing number?
Answer: 47