Keystones — Lintel
Five GCSE retrieval questions · 28 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0062
Answer: 6.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 51°. Find opposite
Answer: 22.2cm -
4. Ratio Mixed ratio problems
£161.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £92.00 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 27, 24, 16, what is the missing number?
Answer: 53