Keystones — Lintel
Five GCSE retrieval questions · 13 June 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 930,000 in standard form
Answer: 9.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.56cm -
4. Ratio Mixed ratio problems
Express the first part of 11:15 as a fraction in simplest form
Answer: 11⁄26 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 21, 38, 20, what is the missing number?
Answer: 13