Keystones — Lintel
Five GCSE retrieval questions · 15 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
120000
Answer: 1.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 44°. Find opposite
Answer: 29cm -
4. Ratio Mixed ratio problems
£266.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £114.00 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 27, 31, 43, what is the missing number?
Answer: 59