Keystones — Lintel
Five GCSE retrieval questions · 22 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00063
Answer: 6.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 41°. Find adjacent side
Answer: 25.7cm -
4. Ratio Mixed ratio problems
£276.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £92.00 -
5. Statistics Mean
The mean of 5 numbers is 24. If 4 of them are 45, 47, 22, 44, what is the missing number?
Answer: -38