Keystones — Lintel
Five GCSE retrieval questions · 1 January 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00015 in standard form
Answer: 1.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 13x + 22
Answer: (x + 11)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.38cm -
4. Ratio Mixed ratio problems
£248.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £155.00 -
5. Statistics Mean
The mean of 6 numbers is 39. If 5 of them are 49, 31, 33, 38, 37, what is the missing number?
Answer: 46