Digit sum

The digit sum of the two-digit number is nine. When we turn figures and multiply by the original two-digit number, we get 2430. What is the original two-digit number?

Correct answer:

c1 =  45
c2 =  54

Step-by-step explanation:

c=10x+y x+y=9 c (10y+x)=2430 c:18,27,36,45 v1=18 81=1458 v2=27 72=1944 v3=36 63=2268 v4=45 54=2430 c1=45

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
Are you looking for help with calculating roots of a quadratic equation?
Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?
Do you solve Diofant problems and looking for a calculator of Diofant integer equations?

Related math problems and questions: