Keystones — Lintel
Five GCSE retrieval questions · 15 September 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 450,000 in standard form
Answer: 4.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 18
Answer: (x + 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 23.41cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £140.00 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 28, 29, 46, 48, what is the missing number?
Answer: 49