Keystones — Lintel
Five GCSE retrieval questions · 5 January 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0056 in standard form
Answer: 5.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 34°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.9cm -
4. Ratio Mixed ratio problems
Orange, purple and pink sweets are in the ratio 3:7:6. What fraction of the sweets are orange?
Answer: 3⁄16 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 38, 21, 35, what is the missing number?
Answer: 6