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

I’m tall when I’m young, and I’m short when I’m old. What am I?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

You see me once in June, twice in November, and not at all in May. What am I?

How many letters are in the alphabet?