People make me, save me, change me, raise me. What am I?

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?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

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?

I always drive my customer away.

Who am I?

What am I?

What does this mean?

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How many triangles are there in the picture below?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?