Keystones — Lintel
Five GCSE retrieval questions · 29 March 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
73000
Answer: 7.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 39°. Find opposite
Answer: 9.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 24. If 5 of them are 19, 37, 15, 25, 27, what is the missing number?
Answer: 21