Keystones — Lintel
Five GCSE retrieval questions · 4 July 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0068 in standard form
Answer: 6.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 48
Answer: (x + 8)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 26.69cm -
4. Ratio Mixed ratio problems
Express the first part of 4:15 as a fraction in simplest form
Answer: 4⁄19 -
5. Statistics Mean
The mean of 6 numbers is 31. If 5 of them are 40, 37, 46, 15, 27, what is the missing number?
Answer: 21