Keystones — Lintel
Five GCSE retrieval questions · 24 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00037
Answer: 3.7 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 54°. Find opposite
Answer: 28.9cm -
4. Ratio Mixed ratio problems
£282.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £188.00 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 15, 47, 44, what is the missing number?
Answer: 34