Question

There is a peculiar two digit number which is three times the sum of the digits.
Which is the number?

Answer 1

Answer:

Let the number be 10x+y

We get,

3(x+y)=10x+y

3x+3y=10x+y

2y=7x

y=7x/2

So when,

x=2 then y=7

Then the number is 10(2)+7 = 27