Question

Sum of the digits of a two digit number is 5. When the digits are interchanged, it is found that the new number is less than the original by 9. What is the two digit number

Answer 1

Answer:

23

Step-by-step explanation:

The sum of two digits of two digit number i.e. 23 is

2+3= 5.

If the place is changed then the number will be 32.

Now,

32-23=9.

Answer 2

Answer:

Let the number be 10x+y

10x+y=5---(1)

10x+y-(10y+x)=9

or

10x-x-10y+y=9

or

9x-9y=9

x-y=1---(2)

Add 1&2

X=6 & y= - 1