Keystones — Lintel
Five GCSE retrieval questions · 16 April 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.088 in standard form
Answer: 8.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 46.77cm -
4. Ratio Mixed ratio problems
£110.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £66.00 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 23, 23, 27, 42, what is the missing number?
Answer: 50