Keystones — Lintel
Five GCSE retrieval questions · 8 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
33000
Answer: 3.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 44°. Find opposite
Answer: 11.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 35, 17, 50, what is the missing number?
Answer: -2