Keystones — Lintel
Five GCSE retrieval questions · 17 July 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
630000
Answer: 6.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 44°. Find adjacent side
Answer: 23.7cm -
4. Ratio Mixed ratio problems
Divide 210 in the ratio 2:2:3
Answer: 60, 60 and 90 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 50, 40, 27, what is the missing number?
Answer: -25