other Maths Puzzle Numerical Ability Permutation and Combination

Numbers like 12345, 13542 and 21435 are some of the 120 different arrangements that can be made from the digits 1, 2 , 3, 4 and 5. If all 120 arrangements are placed in ascending manner, what will be the 87th number?

Read Solution (Total 3)

1 _ _ _ _ =24
2 _ _ _ _ =24
3 _ _ _ _ =24
4 1 _ _ _ =6
4 2 _ _ _ =6
4 3 1 2 5 =85th
So, 87th = 43215
10 years agoHelpfull: Yes(5) No(0)

no starting with 1 =4!=24
2 =4!=24
3 =4!=24
31=3!=6
32=3!=6
321=2!=2
so 87 th no must be starting with 324...
so ascending order no wil be 32415
10 years agoHelpfull: Yes(1) No(5)
@Suhotro - can you please explain your answer ???
10 years agoHelpfull: Yes(1) No(0)

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