Keystones — Lintel
Five GCSE retrieval questions · 28 May 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 820,000,000 in standard form
Answer: 8.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 42
Answer: (x + 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.43cm -
4. Ratio Mixed ratio problems
£306.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £170.00 -
5. Statistics Mean
The mean of 6 numbers is 28. If 5 of them are 30, 29, 33, 26, 24, what is the missing number?
Answer: 26