Keystones — Lintel
Five GCSE retrieval questions · 8 March 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 900,000,000 in standard form
Answer: 9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 20
Answer: (x + 10)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 29.26cm -
4. Ratio Mixed ratio problems
£174.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £116.00 -
5. Statistics Mean
Calculate the mean of: 21, 8, 36, 22, 36, 11, 34, 23. Give your answer to 2 decimal places
Answer: 23.88