Keystones — Lintel
Five GCSE retrieval questions · 19 January 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.054
Answer: 5.4 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 30°. Find opposite
Answer: 11cm -
4. Ratio Mixed ratio problems
£351.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £156.00 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 30, 30, 31, what is the missing number?
Answer: 9