Keystones — Lintel
Five GCSE retrieval questions · 17 May 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.0048
Answer: 4.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 54°. Find adjacent side
Answer: 15.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 21. If 3 of them are 36, 21, 40, what is the missing number?
Answer: -13