You can see it everyday, But cannot touch it at will. What is it?

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

I have teeth but i don't bite. Who Am I ?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

What goes up but never comes down?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

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

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.