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

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

What will you call your mother's brother's brother-in-law?

Move four matchsticks to the below square to form three squares?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

What goes through cities and fields, but never moves?