Keystones — Lintel
Five GCSE retrieval questions · 19 May 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00068 in standard form
Answer: 6.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 24
Answer: (x + 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 42.84cm -
4. Ratio Mixed ratio problems
Express the second part of 6:12 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
The mean of 6 numbers is 35. If 5 of them are 40, 19, 26, 33, 33, what is the missing number?
Answer: 59