Keystones — Lintel
Five GCSE retrieval questions · 15 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0028
Answer: 2.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 51°. Find opposite
Answer: 18.5cm -
4. Ratio Mixed ratio problems
£288.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 34, 28, 39, what is the missing number?
Answer: -1