Keystones — Lintel
Five GCSE retrieval questions · 8 September 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 120,000,000 in standard form
Answer: 1.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 20
Answer: (x + 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.79cm -
4. Ratio Mixed ratio problems
£224.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £160.00 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 50, 22, 24, what is the missing number?
Answer: 24