John wants to send a letter to Peter, who lives on Tesla
Street. John doesn't remember the house number.
However, he knows that it has 4 digits, it is a multiple of 5
and 7 and that the last digit is 0. What is the minimum number
of letters that John has to send to be sure that Peter receives his letter?
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Home » Mathematics » John wants to send a letter to Peter, who lives on Tesla Street. John doesn't remember the house number. However, he knows that it has 4 digits, it is a multiple of 5 and 7 and that the last digit is 0.