Keystones — Lintel
Five GCSE retrieval questions · 9 March 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 13,000 in standard form
Answer: 1.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 24
Answer: (x - 2)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 13.58cm -
4. Ratio Mixed ratio problems
£216.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £144.00 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 50, 38, 28, 48, what is the missing number?
Answer: 21