Question

how many such pairs of digits are there in the 421579368 each of which has as many digits between them in the no. as when they are arranged in ascending order ??????


plzz give proper reasons.....​

Answer 1

ans is three

Explanation ..

given no. ... 4 2 1 5 7 9 3 6 8

ascending order : 1 2 3 4 5 6 7 8 9

hence required pairs are 12, 49 , 16

Answer 2

Only one is possible

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