What four weights can be used to balance from 1 to 30 pounds?

What am I?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

What is the largest number you can write with just 3 digits?

What goes up but never comes down?

Two old friends, Jack and Jill, meet after a long time, and discussing as:

Jack: Hey, how are you, man?

Bill: Not bad, got married and I have three kids now.

Jack: That's awesome. How old are they?

Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.

Jack: Cool..But I still don't know.

Bill: My eldest kid just started taking piano lessons.

Jack: Oh, now I get it.

How old are Bill's kids?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

Count the number of triangles in the picture below: