Tommy's tankard

Weekly Problem 4 - 2017
Tommy's tankard holds 480ml when it is one quarter empty. How much does it hold when it is one quarter full?
Age
11 to 14
Challenge level
filled star empty star empty star
Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving
Being curious Being resourceful Being resilient Being collaborative

Problem



Tommy's tankard holds $480\text{ml}$ when it is one quarter empty.

How much does it hold when it is one quarter full?

If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.