Keystones — Lintel
Five GCSE retrieval questions · 26 April 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.095 in standard form
Answer: 9.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.09cm -
4. Ratio Mixed ratio problems
£150.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £90.00 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 48, 35, 36, 38, 33, what is the missing number?
Answer: 14