Book Maths Puzzle

If each permutation of the digits 1,2,3,4,5,6 are listed in the increasing order of magnitude, then 289th term will be

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Book Other Question

In how many ways can 12 people be divided into 3 groups of 4 persons(in each group) In how many ways can 10 engineers and 4 doctors be seated at a round table if all the 4 doctors do not sit together?