Keystones — Lintel
Five GCSE retrieval questions · 11 May 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
540000
Answer: 5.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 31°. Find adjacent side
Answer: 29.cm -
4. Ratio Mixed ratio problems
£320.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £120.00 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 49, 50, 41, 42, 15, what is the missing number?
Answer: -35