Answers

2014-06-16T17:38:03+05:30
0 numbers can be formed coz using seven digits n forming a three digit is impossibleb bcoz numbers between 100 n 1000 there are only three digit numbers..i.e' from 101 to 999.........hope i helped u:)
0
2014-06-16T17:40:51+05:30
There can be no numbers formed by using all digits 1,2,3,4,5,6,7    because I will turned into a seven digit number and there is no seven digit number between 100 and 1000
0