If r and s are two positive numbers and r is 25% greater than s, what is the value of the ratio r/s?

What is the value of R in S.I. units ?

A=|(p,q),(r,s)| where p, q, r and s are any four different prime numbers less than 20. What is the maximum value of the determinant ?

If r is a prime number greater than 2, and s is odd, what is rs?

If (r)/(3)=6 , what is the value of (4s)/(r) ?

The operation & is defined as r & s =(s^(2)-r^(2))/(r+s) where r and s are real number and r ne -s . What is the value of 3 & 4?

If r and s are any real numbers such that 0 le s,r le 1 and r+ s=1, then what is the. maximum value of the product rs ?

If (2rs)^(-1)=3s^(-2) , what is the value of (r)/(s) ?

The average of r and s is 7.5, and the average of r, s and t is 11. What is the value of t?