A two digit number is such that the one's digit is four more than the tens digit and the sum of the digit is 14 . find the number ??

Let the tens digit be x and the ones digit be x + 4.

According to the given conditions:
x + (x + 4) = 14
2x + 4 = 14
2x = 10
x = 5

Therefore, the tens digit is 5 and the ones digit is 5 + 4 = 9.

So, the number is 59.

Let the tens digit be x . Then the one's digit is x+4 . Therefore the number will be 10x +x+4 = 11x +4

Now , sum of the digits is given as 14 , therefore 14 = 11x + 4 => x = 10/11 = 1

Therefore the tens digit is 1 and the ones digit 5. hence the number is 15