Keystones — Lintel
Five GCSE retrieval questions · 4 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0055
Answer: 5.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 33°. Find opposite
Answer: 15.6cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 3:4:1
Answer: 81, 108 and 27 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 31, 16, 38, what is the missing number?
Answer: 19