an n digit number is a positive number with exactly n digits. atleast nine hundered n digit numbers are to be formed using only the three digits 2,5 and 7. find the smallest n for which this is possible.
the first digit can be done in three ways ,the second digit in 3 ways and so on,
Therefore,
3n >= 900
(given atleast)
or leat n value = 7
GIVE LIFE THE BEST....srini...
DO OR DIE, OR BETTER NEVER TRY!!
I dont want to be the most intelligent among the ten.i pray the other nine RE fools!???!!!!!!
it doesn't matter if you win... whats important to me is i win!!!!!!!!
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
2
