Keystones — Lintel
Five GCSE retrieval questions · 27 January 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.025 in standard form
Answer: 2.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x + 4
Answer: (x + 2)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.85cm -
4. Ratio Mixed ratio problems
£259.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £111.00 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 27, 15, 44, 27, what is the missing number?
Answer: 52