Last day - Join CAT 2 months Crash course. Enroll now
Free Content
Learn & Practice
College Counselling
AP
TS
The rightmost non-zero digit of the number $$30^{2720}$$ is
1
3
7
9
Rightmost non-zero digit of $$30^{2720}$$ is same as rightmost non-zero digit of $$3^{272}$$.
272 is of the form 4k.
All $$3^{4k}$$ end in 1.
=> Right most non-zero digit is 1.
Create a FREE account and get:
Ask doubts feature is currently unavailable for you. You can reach us at support@cracku.in for any further details/doubts.
Boost your Prep!
