Keystones — Lintel
Five GCSE retrieval questions · 24 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
74000000
Answer: 7.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 53°. Find opposite
Answer: 39.8cm -
4. Ratio Mixed ratio problems
£140.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £56.00 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 17, 15, 35, what is the missing number?
Answer: 25