Keystones — Lintel
Five GCSE retrieval questions · 20 November 2024 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00034
Answer: 3.4 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 65°. Find adjacent side
Answer: 14.4cm -
4. Ratio Mixed ratio problems
Divide 207 in the ratio 4:4:1
Answer: 92, 92 and 23 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 28, 25, 32, 43, 37, what is the missing number?
Answer: 33