What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Which English verb becomes past tense just by rearranging the letters?

Which five letter word can be added at the end of below word to form a
valid word?

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

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What can you catch but never throw?

I look at you, you look at me, I raise my right, you raise your left. What am I?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?