- #1
murshid_islam
- 458
- 19
hi
that day, a friends of mine asked me to find out the last digit of 3^999. i knew that i have to find out 3^999 mod 10. but i saw that
3^3 mod 10
= 3^7 mod 10
= 3^11 mod 10 =7
= 3^15 mod 10 =7
.
.
.
=3^999 mod 10 = 7
but i was wondering what if i want to find the last two digits of 3^999. how can i do that?
that day, a friends of mine asked me to find out the last digit of 3^999. i knew that i have to find out 3^999 mod 10. but i saw that
3^3 mod 10
= 3^7 mod 10
= 3^11 mod 10 =7
= 3^15 mod 10 =7
.
.
.
=3^999 mod 10 = 7
but i was wondering what if i want to find the last two digits of 3^999. how can i do that?
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