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Maths Puzzle
if none of the figures 2,4,5,7,8,0 be repeated,how many different numbers of 4 digits can be formed wiyh them.?
Read Solution (Total 4)
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- here 1st place can be filled by five ways(i.e any one from 2,4,5,7,8),and second place will be again in 5 ways (remaining from 6 digits ,6-1=5) and next place in 4 ways ,and again in 3 ways so ans will be 5*5*4*3=300 ans
- 12 years agoHelpfull: Yes(3) No(2)
- numbers of 4 digits numbers that can be formed with 2,4,5,7,8,0 = 5*5*4*3 = 300
- 12 years agoHelpfull: Yes(1) No(0)
- 4 digit number can't be start from 0
different number can be = 5*5*4*3
=300 - 12 years agoHelpfull: Yes(1) No(1)
- 6p4
=6!/(6-4)!
=6*5*4*3
=360 - 11 years agoHelpfull: Yes(0) No(1)
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