Gmatguy007 wrote:
Archit143 wrote:
If \(n = 33^{43} + 43^{33}\) what is the units digit of n?
A. 0
B. 2
C. 4
D. 6
E. 8
PS00564
A. 0
B. 2
C. 4
D. 6
E. 8
PS00564
In order to be sure for the understanding of the method, if we had to find the unit digit of 47^26 + 26^47 we would focus on the 7^6 which gives us unit digit 9 and 6^7 with unit digit 9. So the unit digit of 47^26 + 26^47 is 9+6 = 15, am I correct?
__________________
Yes, you are right.
Statistics : Posted by Bunuel • on 03 Oct 2012, 23:13 • Replies 17 • Views 183118