The sum of the digits of a 2-digit number is subtracted from the number. The resulting number has the units digit of 6. Which numbers have this property?
 
                Answer: 
            
        All numbers from 40 to 49
- According to the question, the sum of the digits of a 2-digit number is subtracted from the number. The resulting number has the units digit of 6.
- Let us assume the number 40 has that property.
 Now, the sum of the digits of number 40 = 4 + 0 = 4
 Subtracting the sum of the digits of number 40 from 40
 40 - 4 = 36Similarly, subtracting the sum of the digits of number 41 from 41 
 41 - 5 = 36 . . . . Similarly, we can say that subtracting the sum of the digits of all numbers from 40 to 49 have units digit 6.
- Therefore, all the numbers from 40 to 49 have this property.
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