Keystones — Lintel
Five GCSE retrieval questions · 30 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.025
Answer: 2.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 16
Answer: (x - 4)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 47°. Find opposite
Answer: 12.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 36, 41, 25, what is the missing number?
Answer: 46