A 2- digit number with 2 different digits has a special property:
1 answer:
Hello,
a is the digit of tenth (not zero)
b the digit of units
The number is 10*a+b
Sum of digits: a+b
Product of digits=a*b
a+b+ab=10a+b
==>9a=ab
==>b=9
Th smallest number is 19.
1+9=10
1*9=9
10+9=19
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