Keystones — Lintel
Five GCSE retrieval questions · 5 February 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000052 in standard form
Answer: 5.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 54
Answer: (x + 6)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 34.43cm -
4. Ratio Mixed ratio problems
Divide 75 in the ratio 2:1:2
Answer: 30, 15 and 30 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 18, 41, 33, what is the missing number?
Answer: 52