Keystones — Lintel
Five GCSE retrieval questions · 15 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0098
Answer: 9.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 16
Answer: (x - 4)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 54°. Find adjacent side
Answer: 8.8cm -
4. Ratio Mixed ratio problems
£189.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £54.00 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 25, 15, 36, 25, 35, what is the missing number?
Answer: 92