Keystones — Lintel
Five GCSE retrieval questions · 24 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00072 in standard form
Answer: 7.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.43cm -
4. Ratio Mixed ratio problems
£215.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £129.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 23, 23, 50, what is the missing number?
Answer: 28