Keystones — Lintel
Five GCSE retrieval questions · 10 February 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.0062
Answer: 6.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 36°. Find adjacent side
Answer: 13.8cm -
4. Ratio Mixed ratio problems
Express the first part of 3:5 as a fraction in simplest form
Answer: 3⁄8 -
5. Statistics Mean
The mean of 6 numbers is 21. If 5 of them are 45, 26, 19, 42, 15, what is the missing number?
Answer: -21