Keystones — Lintel
Five GCSE retrieval questions · 16 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0097 in standard form
Answer: 9.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 9
Answer: (x + 1)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.59cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £168.00 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 33, 41, 29, what is the missing number?
Answer: 53