Keystones — Lintel
Five GCSE retrieval questions · 2 September 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000055 in standard form
Answer: 5.5 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 8
Answer: (x + 1)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 8.39cm -
4. Ratio Mixed ratio problems
Black, white and yellow sweets are in the ratio 4:8:11. What fraction of the sweets are yellow?
Answer: 11⁄23 -
5. Statistics Mean
Calculate the mean of: 37, 10, 48, 6, 37, 34. Give your answer to 2 decimal places
Answer: 28.67