Keystones — Lintel
Five GCSE retrieval questions · 19 July 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.064
Answer: 6.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 37°. Find adjacent side
Answer: 30.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 31. If 5 of them are 49, 44, 30, 44, 22, what is the missing number?
Answer: -3