Keystones — Lintel
Five GCSE retrieval questions · 5 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
49000000
Answer: 4.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 39°. Find adjacent side
Answer: 24.9cm -
4. Ratio Mixed ratio problems
Simplify: 8:10:12
Answer: 4:5:6 -
5. Statistics Mean
The mean of 6 numbers is 23. If 5 of them are 19, 28, 32, 26, 47, what is the missing number?
Answer: -14