Mystery number

A mystery number is between 800 and 920. No digits are the same. The difference of the number is 5. What is the mystery number?

Result

x1 =  803
x2 =  812
x3 =  821
x4 =  830
x5 =  904
x6 =  913

Solution:

x1=803x_{ 1 } = 803
x2=812x_{ 2 } = 812
x3=821x_{ 3 } = 821
x4=830x_{ 4 } = 830
x5=904x_{ 5 } = 904
x6=913x_{ 6 } = 913

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Dr Math
The difference of the number is 5 - we calculate difference between digits is 5....

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