Keystones — Lintel
Five GCSE retrieval questions · 25 March 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 920,000 in standard form
Answer: 9.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.42cm -
4. Ratio Mixed ratio problems
Divide 275 in the ratio 3:4:4
Answer: 75, 100 and 100 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 18, 44, 43, 44, what is the missing number?
Answer: 41