Question

The sum of the digit of two digit number is 15.The number got by interchanging the digit is 27 more than the orginal number.what is the number

Answer 1

=27÷15
=1.8 is the answer

Answer 2

Let the digits of that two digit number be x and y

According to the given question.

x + y = 11 ... Equation ( i )

This two digit number can be written like this 10x + y

When we interchange the digits the new number becomes 10y + x

According to the given address question

10y + x = 27 + 10x + y

9y - 9x = 27

y - x = 3 ... Equation ii

Now, Add both the Equations we have

2y = 14

y = 7

Put value of y in Equation i we have

x + 7 = 11

x = 4

So, the two digit number is 47