Keystones — Lintel
Five GCSE retrieval questions · 12 June 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 64,000 in standard form
Answer: 6.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.05cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3kg : 950g
Answer: 60:19 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 43, 20, 36, 44, what is the missing number?
Answer: 47