Keystones — Lintel
Five GCSE retrieval questions · 4 November 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0039 in standard form
Answer: 3.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 52°. Find opposite. Give your answer to 2 decimal places
Answer: 25.6cm -
4. Ratio Mixed ratio problems
Divide 174 in the ratio 1:2:3
Answer: 29, 58 and 87 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 28, 24, 34, 18, what is the missing number?
Answer: 26