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

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

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?

What word begins and ends with an E, but has only one letter?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

What month of the year has 28 days?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

Can you write down eight eights so that they add up to one thousand?