Keystones — Lintel
Five GCSE retrieval questions · 1 August 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.00017
Answer: 1.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 26°. Find adjacent side
Answer: 31.5cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 25. If 4 of them are 49, 41, 29, 20, what is the missing number?
Answer: -14