Keystones — Lintel
Five GCSE retrieval questions · 17 May 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.0027
Answer: 2.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 41°. Find opposite
Answer: 9.6cm -
4. Ratio Mixed ratio problems
Divide 210 in the ratio 2:2:3
Answer: 60, 60 and 90 -
5. Statistics Mean
The mean of 6 numbers is 39. If 5 of them are 48, 35, 18, 40, 27, what is the missing number?
Answer: 66