Keystones — Lintel
Five GCSE retrieval questions · 13 May 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 9,200,000 in standard form
Answer: 9.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 8.69cm -
4. Ratio Mixed ratio problems
£306.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £136.00 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 15, 31, 18, what is the missing number?
Answer: 64