Keystones — Lintel
Five GCSE retrieval questions · 20 August 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0064 in standard form
Answer: 6.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 48
Answer: (x + 6)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.24cm -
4. Ratio Mixed ratio problems
£186.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £124.00 -
5. Statistics Mean
The mean of 5 numbers is 30. If 4 of them are 20, 30, 32, 21, what is the missing number?
Answer: 47