Problems based on Numbers Test 5

Question : 26 of 40

Marks: +1, -0

The sum of the digits of a two-digit number is

1 /5

of the difference between the number and the number obtained by interchanging the positions of the digits. Then the difference between the digits of that number is:

7
9
5
Data inadequate

Validate

Solution:

Let the number be 10x + y; then

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

⇒ 5x + 5y = 9x -9y

⇒(x - y) = 5/ 9 (x + y)

Hence, value of (x + y) is not known so (x – y) cannot be determined.

Go to Question:

Prev Question

Next Question