answersLogoWhite

0

I guess you mean what's the units digit of 32011.

It is 7.

To work this out, see how the units digit of 3n changes; it goes:

3, 9, 7, 1, 3, 9, 7, 1, ...

(only the first 8 powers are shown) repeating the same sequence of 4 digits. So if we find the remainder of 2011 divided by 4, it will tell us which of the four numbers (3, 9, 7, 1) will be the units digit of 32011:

2011 ÷ 4 ⇒ remainder 3, so the 3rd digit is the required digit: 7.

(If there had been no remainder, then the 4th digit, namely 1, would have been the required value.)

User Avatar

Wiki User

14y ago

Still curious? Ask our experts.

Chat with our AI personalities

MaxineMaxine
I respect you enough to keep it real.
Chat with Maxine
RafaRafa
There's no fun in playing it safe. Why not try something a little unhinged?
Chat with Rafa
FranFran
I've made my fair share of mistakes, and if I can help you avoid a few, I'd sure like to try.
Chat with Fran

Add your answer:

Earn +20 pts
Q: What is the units digit in 3 power 2011?
Write your answer...
Submit
Still have questions?
magnify glass
imp