List of top Logical Reasoning Questions on Ratio and Proportion asked in ATMA

It XY = 5:7, XZ 3:8 and W:Y4:9 then what is X: W?

The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?