Skip over navigation
On planet Zog, they use green and blue bank notes.
Three green notes and eight blue notes are worth 46 zogs.
Eight green notes and three blue notes are worth 31 zogs.
How many zogs are two green notes and three blue notes worth?
If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.
Alien Currency
Age 14 to 16
ShortChallenge Level 
On planet Zog, they use green and blue bank notes.
Three green notes and eight blue notes are worth 46 zogs.
Eight green notes and three blue notes are worth 31 zogs.
How many zogs are two green notes and three blue notes worth?
If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.
This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.
You may also like
Ladder and Cube
A 1 metre cube has one face on the ground and one face against a wall. A 4 metre ladder leans against the wall and just touches the cube. How high is the top of the ladder above the ground?
Bendy Quad
Four rods are hinged at their ends to form a convex quadrilateral. Investigate the different shapes that the quadrilateral can take. Be patient this problem may be slow to load.