Keystones — Lintel
Five GCSE retrieval questions · 5 January 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
470000
Answer: 4.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 38°. Find adjacent side
Answer: 29.9cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 1:2:1
Answer: 42, 84 and 42 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 25, 37, 45, what is the missing number?
Answer: 17