Keystones — Lintel
Five GCSE retrieval questions · 25 September 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.056
Answer: 5.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 58°. Find adjacent side
Answer: 8.5cm -
4. Ratio Mixed ratio problems
Divide 160 in the ratio 2:1:2
Answer: 64, 32 and 64 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 29, 30, 46, 28, what is the missing number?
Answer: 52