Keystones — Lintel
Five GCSE retrieval questions · 4 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
9800000
Answer: 9.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 60°. Find opposite
Answer: 43.3cm -
4. Ratio Mixed ratio problems
£423.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £235.00 -
5. Statistics Mean
The mean of 5 numbers is 25. If 4 of them are 15, 49, 17, 44, what is the missing number?
Answer: 0