# The largest number

Find the largest integer such that:

1. No figures is not repeat,
2. multiplication of every two digits is odd,
3. addition all digits is odd.

Result

x =  9753

#### Solution:

$MAX = 9876543210 \ \\ 9\cdot 7 = 63 \ \\ 7\cdot 5 = 35 \ \\ 5\cdot 3 = 15 \ \\ \ \\ \ \\ 9+7+5+3 = 24 \ \\$

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