Keystones — Lintel
Five GCSE retrieval questions · 28 March 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00045 in standard form
Answer: 4.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x + 14
Answer: (x + 7)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 7.27cm -
4. Ratio Mixed ratio problems
£343.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £147.00 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 44, 19, 49, 22, what is the missing number?
Answer: 36