



 
Hi Tina,
I am going to write the possible candidates for your 3 digit number starting with the digit in the hundredth place.
Now add the digit in the tens place. It is 4 less than the digit in the hundredth place so the possibilities are
A hundredths digit of 3, 2 or 1 is not possible since 4 less than any of these digits is not a digit. The digit in the tens place is 3 more than the digit in the ones place so what are the possibilities for the three digit number? Which one has 13 as the sum of its digits? Penny
 


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