Keystones — Lintel
Five GCSE retrieval questions · 25 June 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00044 in standard form
Answer: 4.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 55
Answer: (x + 11)(x + 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.28cm -
4. Ratio Mixed ratio problems
Simplify the ratio £3 : 90p
Answer: 10:3 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 33, 23, 35, 31, what is the missing number?
Answer: 8