Keystones — Lintel
Five GCSE retrieval questions · 13 January 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000089 in standard form
Answer: 8.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 19.97cm -
4. Ratio Mixed ratio problems
£140.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 26, 25, 25, what is the missing number?
Answer: 48