Question

one of the two digits of a 2 digit number is three times the other. if we interchande the digits and add the resulting no. to the original no.we get 132. find the number

Answer 1

Answer:

39 or 93

Step-by-step explanation

Let the number have x,y as 2 digits number being represented as 10x + y

Let us assume that x = 3y (one of the digits is three times the other)

Reverse of the original number is represented as 10y + x

Adding both

10x + y + 10y + x = 132

11(x + y) = 132

x + y = 12 -(1)

Also

x = 3y  - (2)

Solving (1) and (2)

We get,

x = 9,y = 3

While if we take y = 3x then,

x = 3,y = 9

Hence the number can be  39 or 93.