Keystones — Lintel
Five GCSE retrieval questions · 6 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
560000
Answer: 5.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 57°. Find adjacent side
Answer: 14.2cm -
4. Ratio Mixed ratio problems
Simplify: 6:12:9
Answer: 2:4:3 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 19, 19, 31, 38, 43, what is the missing number?
Answer: 42