Riddle me this Vol 4

Hello ladies and gents today we are getting riddly very riddley

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I am weightless but can be seen. Put me in a bucket and I’ll make it lighter. What am I?

A Hole

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What do you call a can opener that doesn’t work?

A can’t opener.

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How fast do librarians travel?

They Book

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Why did the smart phone need glasses?

Because it lost all of its contacts.

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What do you call a three humped camel?

Pregnant

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There are ten cats on a boat. One jumps off. How many are left?

None, they are all copycats.

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I hope you enjoyed these head scratchers