Keystones — Lintel
Five GCSE retrieval questions · 4 November 2024 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00094
Answer: 9.4 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 51°. Find opposite
Answer: 18.5cm -
4. Ratio Mixed ratio problems
£343.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £196.00 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 42, 22, 24, 38, what is the missing number?
Answer: 49