Keystones — Lintel
Five GCSE retrieval questions · 30 January 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
36000000
Answer: 3.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 35°. Find opposite
Answer: 17.5cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 47, 22, 25, 41, what is the missing number?
Answer: 30