Keystones — Lintel
Five GCSE retrieval questions · 31 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00086
Answer: 8.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 58°. Find opposite
Answer: 25.6cm -
4. Ratio Mixed ratio problems
£350.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £150.00 -
5. Statistics Mean
The mean of 4 numbers is 21. If 3 of them are 23, 41, 43, what is the missing number?
Answer: -23