Keystones — Lintel
Five GCSE retrieval questions · 6 April 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 78,000 in standard form
Answer: 7.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 33.03cm -
4. Ratio Mixed ratio problems
Divide 104 in the ratio 1:1:2
Answer: 26, 26 and 52 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 30, 23, 36, what is the missing number?
Answer: 43