In the Delhi zoo, there are some ducks and rabbits. If the heads are counted, there are 160, while the legs are 450. What will be the number of ducks ...

The price of commodity X increases by 40 paise every year, while the price of commodity Y increases ...

The number of distinct integer solutions (x,y) of the equation |x+y|+|x−y|=2 , is ...

For some constant real numbers p,k and a , consider the following system of linear equations in x ...

For some real numbers $$ a $$ and $$ b $$, the system of equations $$ x + y = 4 $$ and $$ (a + ...

If $$ a $$ and $$ b $$ are non-negative real numbers such that $$ a + 2b = 6 $$, then the avera...

A donation box can receive only cheques of ₹100, ₹250, and ₹500. On one good day, the donation box w...