Keystones — Lintel
Five GCSE retrieval questions · 24 September 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0041 in standard form
Answer: 4.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 80
Answer: (x + 10)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.54cm -
4. Ratio Mixed ratio problems
Divide 232 in the ratio 1:4:3
Answer: 29, 116 and 87 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 26, 21, 47, what is the missing number?
Answer: 22