Keystones — Lintel
Five GCSE retrieval questions · 16 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0065
Answer: 6.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 27°. Find adjacent side
Answer: 27.6cm -
4. Ratio Mixed ratio problems
£170.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £102.00 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 28, 31, 47, what is the missing number?
Answer: 34