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Solution


Q.

If all the six digit numbers x1 x2 x3 x4 x5 x6 with 0<x1<x2<x3<x4<x5<x6 are arranged in the increasing order, then the sum of the digits in the 72th number is ___________ .           [2023]

Ans.

(32)

2 4 5 6 7 8 → 72th word. So, 2 + 4 + 5 + 6 + 7 + 8 = 32