Math CentralQuandaries & Queries


Question from Khiya, a student:

Mr. Schneider's mass is 2 digits. The first digit is 3 times the second digit. Both digits are odd numbers, and his mass is greater than 35 kg. What is Mr. Schneider's mass?

Hi Khiya,

If the first digit is 3 times the second digit then the first digit is a multiple of 3. Hence the first digit must be 0, 3, 6 or 9. In each case what is the second digit?


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