Keystones — Lintel
Five GCSE retrieval questions · 3 April 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 98,000,000 in standard form
Answer: 9.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 24
Answer: (x - 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 24.77cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 litres : 500 ml
Answer: 10:1 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 35, 41, 24, what is the missing number?
Answer: 36