Keystones — Lintel
Five GCSE retrieval questions · 19 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
12000000
Answer: 1.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 30°. Find opposite
Answer: 16.7cm -
4. Ratio Mixed ratio problems
£256.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £160.00 -
5. Statistics Mean
The mean of 6 numbers is 28. If 5 of them are 47, 41, 27, 39, 50, what is the missing number?
Answer: -36