Keystones — Lintel
Five GCSE retrieval questions · 4 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
76000000
Answer: 7.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 58°. Find opposite
Answer: 41.6cm -
4. Ratio Mixed ratio problems
Express the first part of 5:3 as a fraction in simplest form
Answer: 5⁄8 -
5. Statistics Mean
The mean of 6 numbers is 39. If 5 of them are 23, 26, 17, 30, 39, what is the missing number?
Answer: 99