Keystones — Lintel
Five GCSE retrieval questions · 18 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
65000
Answer: 6.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 60°. Find opposite
Answer: 43.3cm -
4. Ratio Mixed ratio problems
Express the first part of 2:5 as a fraction in simplest form
Answer: 2⁄7 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 29, 19, 37, what is the missing number?
Answer: 19