Question

a number consists of two digits.if the digits interchange their places and the new number is added to the original number, then the number becomes two times of the original no.find the number. please explain in detail​

Answer 1

Answer:

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Answer 2

Answer:

Let the given number be (10x+y) where the ten's digit is x and one(unit)'s digit is y.

Now, the number obtained by interchanging the digits=(10y+x)

On adding these no.'s =(10x+y)+(10y+x)=11(x+y)

where 11(x+y) is clearly divisible by 11