Keystones — Lintel
Five GCSE retrieval questions · 2 July 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00033
Answer: 3.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 38°. Find opposite
Answer: 10.2cm -
4. Ratio Mixed ratio problems
£228.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £76.00 -
5. Statistics Mean
The mean of 5 numbers is 21. If 4 of them are 25, 49, 25, 37, what is the missing number?
Answer: -31