Powerful Finale

Weekly Problem 24 - 2017
What is the last digit of $3^{2011}$?
Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving
Being curious Being resourceful Being resilient Being collaborative

Problem



What is the last digit of $3^{2011}$?

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