-
samirpandeyit62
- Master | Next Rank: 500 Posts
- Posts: 460
- Joined: Sun Mar 25, 2007 7:42 am
- Thanked: 27 times
What will be the number in the units position for the following number.
(13)^4 * (17)^2 * (29)^3
This is very simple
the appraoch is as such:
(13)^4 will have last digit same as 3^4 = 1
(17)^2 will have last digit same as 7^2 =9
(29)^3 will have last digit same as 9^3 = 9
so expr will havbe last digit of the product 1*9*9 = 1
(13)^4 * (17)^2 * (29)^3
This is very simple
the appraoch is as such:
(13)^4 will have last digit same as 3^4 = 1
(17)^2 will have last digit same as 7^2 =9
(29)^3 will have last digit same as 9^3 = 9
so expr will havbe last digit of the product 1*9*9 = 1
Regards
Samir
Samir
