The number of points in space, whose each co-ordinate is a negative integer such that `x +y+z+ 12= 0`

What are X co-ordinates of each point on Y-axis?

What are X-co-ordinates of each point on Y-axis?

What are X-co-ordinates of each point on Y-axis?

The polar co-ordinates of the point whose cartesian co-ordinates are (-1,-1) is :

The polar co-ordinates of the point whose cartesian co-ordinates are (5, 0) , are

A point is on x-axis. What are its y-co-ordinate and z-co-ordinate ?

Number of points with integral co-ordinates that lie inside a triangle whose co-ordinates are (0, 0), (0, 21) and (21,0).

Number of points with integral co-ordinates that lie inside a triangle whose co-ordinates are (0, 0), (0, 21) and (21,0).