Question asked :
Question 1 three rational number lying between 1/2 & 5/7. Answer: Step 1:: Make denominator same, multiply by lcm of 2&7is 14 Therefore number is 7/14&10/14 From here you can easily get two rational number but we need three so again multiply by 2 So number is 14/28 & 20/28 So rational number is 15/28,16/28,17/28,18/28,19/28 Answer. 
