Keystones — Lintel
Five GCSE retrieval questions · 8 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00094 in standard form
Answer: 9.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 36
Answer: (x - 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 9.72cm -
4. Ratio Mixed ratio problems
£264.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £165.00 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 32, 21, 37, what is the missing number?
Answer: 26