Keystones — Lintel
Five GCSE retrieval questions · 14 January 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0068 in standard form
Answer: 6.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.75cm -
4. Ratio Mixed ratio problems
Simplify the ratio £7 : 20p
Answer: 35:1 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 16, 46, 35, what is the missing number?
Answer: 43