Keystones — Lintel
Five GCSE retrieval questions · 29 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
580000
Answer: 5.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 50°. Find adjacent side
Answer: 15.4cm -
4. Ratio Mixed ratio problems
£248.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £155.00 -
5. Statistics Mean
The mean of 6 numbers is 23. If 5 of them are 30, 21, 35, 19, 17, what is the missing number?
Answer: 16