Keystones — Lintel
Five GCSE retrieval questions · 18 September 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00019 in standard form
Answer: 1.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 44
Answer: (x + 4)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.24cm -
4. Ratio Mixed ratio problems
Express the first part of 13:9 as a fraction in simplest form
Answer: 13⁄22 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 49, 27, 22, 37, what is the missing number?
Answer: 45