Keystones — Lintel
Five GCSE retrieval questions · 24 October 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0064 in standard form
Answer: 6.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x - 24
Answer: (x + 2)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.51cm -
4. Ratio Mixed ratio problems
Divide 261 in the ratio 4:4:1
Answer: 116, 116 and 29 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 19, 32, 38, 37, 18, what is the missing number?
Answer: 60