A 2-digit number is such that the product of the digits plus the sum of the digits is equal to the number. What is the units digit of the number?
maybe 39? 3*9 + 3+9 = 27 +12 = 39
9
Check this:
https://artofproblemsolving.com/wiki/index.php/2014_AMC_8_Problems/Problem_22
There are 9 numbers that satisfy all the conditions in your question:
19 , 29 , 39 , 49 , 59 , 69 , 79 , 89 , 99 , Total = 9
