Question

15. In a two digit number the digit in the units
place is 'x' and digit in tens place is 'y' then
the two digit number obtained by reversing
the digit is ---
(10x + y; 10y +x; 10x + 10y; 10xy]​

Answer 1

Answer:

Suppose our number is 53.It has 3 at units digit and 5 as tens digit

So 53 can be written as 10×5+3

Similarlly any 2 digit number  say 'yx' with x at units digit and y as tens digit  which can be written as 10x+y

Another approach is say our number is yx then by dividing it with 10 we get remainder x and quotient as y

So we know that dividend=divisor×quotient+remainder

So xy=10×y+x