Keystones — Lintel
Five GCSE retrieval questions · 30 July 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 690,000,000 in standard form
Answer: 6.9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.98cm -
4. Ratio Mixed ratio problems
Orange and purple sweets are in the ratio 11:6. What fraction of the sweets are purple?
Answer: 6⁄17 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 16, 35, 27, 28, what is the missing number?
Answer: 29