Keystones — Lintel
Five GCSE retrieval questions · 20 September 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
2800000
Answer: 2.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 39°. Find adjacent side
Answer: 28.8cm -
4. Ratio Mixed ratio problems
£270.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £150.00 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 20, 37, 48, 39, what is the missing number?
Answer: 1