x varies directly as the product of u and v and inversely as their sum. If x =3 when u = 3 and v =1. What is the value of x if u = 3 and v =3

y is inversely proportional to x and y = 4 when x = $\frac{1}{2}$. Find x when y =10

The time taken to do a piece of work is inversely proportional to the number of men employed. If ity takes 30 men to do a  piece of work in 6days, how many men are required to do the work in 4 days

$W\propto {{L}^{2}}$and W = 6 and L = 4, if L = $\sqrt{17}$, find W

If p varies inversely as the square of q and p = 8 when q = 4, find when p = 32

If y varies directly as the square root of x and y =3 and x =16. Calculate y when x = 64

If x varies directly as square root of y and x = 81 when y =9, find x when y = $1\tfrac{7}{9}$

Find the value of x at the minimum point of the curve $y={{x}^{3}}+{{x}^{2}}-x+1$

U is inversely proportional to the cube of V and U = 81 when V = 2. Find U when V=3

$\begin{align}  & P\text{ varies jointly as }m\text{ and }u,\text{ varies inversely as }q.\text{ Given that }p=4,\text{ }m=3\text{ } \\ & \text{and }u=2\text{ when }q=1,\text{find  the value of }p\text{ when }m=6,u=4\text{ and }q=\tfrac{8}{5} \\ & (A)\text{  }\tfrac{128}{5}\text{  (B) }15\text{  (C) 10  (D)  }\tfrac{288}{5} \\\end{align}$

The pie charts above shows the statistical distribution of 80 students in five subjects in an examination. Calculate how many students offer Mathematics

P varies directly as Q and inversely as R , when Q  = 36 and R =16 , R = 27. Find the relation between P, Q and R

If x varies directly as the square of P and inversely as Q,  and x = 25 when P = 4 and Q = 2, find x when P = 6 and Q =3

If y varies directly as x, find the constant of variation when y = 12 and x = 4

The time taken to a piece of work is inversely proportional to the number of men employed. If it takes 45 men to do a piece of work in 5 days, how long will it take 25 men?