Keystones — Lintel
Five GCSE retrieval questions · 29 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0093
Answer: 9.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 36°. Find opposite
Answer: 18.2cm -
4. Ratio Mixed ratio problems
£320.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £120.00 -
5. Statistics Mean
The mean of 6 numbers is 21. If 5 of them are 41, 33, 46, 26, 35, what is the missing number?
Answer: -55