Keystones — Lintel
Five GCSE retrieval questions · 1 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
840000
Answer: 8.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 35°. Find opposite
Answer: 14.7cm -
4. Ratio Mixed ratio problems
£273.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £117.00 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 22, 42, 38, 41, what is the missing number?
Answer: 32