Why is it against the law for a man living in Delhi to be buried in Mumbai?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

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

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

I taste better than I can smell. Who am I?

What can you catch but never throw?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

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?

Can anyone tell me a word in the English dictionary which has a silent 'z'?