Question

how to solve this

Answer 1

i think you'd definitely need to code this to do it efficiently (have a computer do it). its very interesting though, lol.

Answer 2

they don't ask for that. they say to convert the number you get after subtracting into 2 numbers of ascending/descending ordered digits

Answer 3

i think you're misinterpreting the problem. it is pretty simple, it just shouldn't be done by hand.

what is wrong with the problem?

Answer 4

can we use the repeating number ?

Answer 5

or all digits must be different ?

Answer 6

it's really interesting problem. but sorry, I don't know.

Answer 7

my logic is let the last result is a,b,c,d and a.>b>c>d
so after rearrange in decreasing and increasing order I have abcd - dcba = 6174