Keystones — Lintel
Five GCSE retrieval questions · 7 March 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 620,000,000 in standard form
Answer: 6.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.39cm -
4. Ratio Mixed ratio problems
Simplify: 12:16:8
Answer: 3:4:2 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 22, 46, 27, 32, what is the missing number?
Answer: 33