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:

Solution in text x6 =







Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

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#1
Dr Math
The difference of the number is 5 - we calculate difference between digits is 5....

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To solve this example are needed these knowledge from mathematics:

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