With the digits 1,2,3,4,5,6 make all 6-digit numbers, which are not divisible by 5. The no of such 6 digit numbers is?

600

Interview Candidate
Jun 21st, 2005
1
1271

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rajeev

Oct 13th, 2006

simple let we can take 6 numbers as 1,2,3,4,5,6 and no of permutations is 6p6
that is =6*5*4*3*2*1=720.
now to devide from 5 ,the ending nimber shoud be 5.so it is constant. now 5 digits left with us they are 1,2,3,4,6.now find 5p5 that is 5*4*3*2*1=120
therefore the numbers which are not divisible by 5 are =720-120=600.