Keystones — Lintel
Five GCSE retrieval questions · 27 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
91000
Answer: 9.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 35°. Find opposite
Answer: 10.5cm -
4. Ratio Mixed ratio problems
Divide 261 in the ratio 3:4:2
Answer: 87, 116 and 58 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 40, 49, 19, what is the missing number?
Answer: 36