Solution:
Given;
Find three rational numbers between each pair of fractions
A rational number is a number that is expressed as the ratio of two integers, where the denominator should not be equal to zero, e.g 2/3, 7/2 etc
1) 1/3 and 3/4
Three rational numbers between them are

2) 1/5 and 2/3
Three rational numbers between them are

3) 3/8 and 5/6
Three rational numbers between them are

4) 1/4 and 4/5
Three rational numbers between them are

3) 1/6 and 2/5
Three rational numbers between them are

4)