Keystones — Lintel
Five GCSE retrieval questions · 13 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00089
Answer: 8.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 40°. Find adjacent side
Answer: 19.2cm -
4. Ratio Mixed ratio problems
£110.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £44.00 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 47, 19, 19, what is the missing number?
Answer: 59