Riddles of Wash me and I won’t be clean, don’t wash me and I won’t be clean

Riddles of Wash me and I won’t be clean, don’t wash me and I won’t be clean

What can you catch but not throw?

Answer

A cold.

Find me who am I. I am the building with number stories.

Answer

A library.

One simple click, one simple flash.
Preserving a memory, for years I will last.
What am I?

Answer

Photograph.

When fully formed, they are sound. When empty they confound. While many are the same, rarely are they seen. What are they?

Answer

Thoughts

Where does Wednesday come after Friday?

Answer

In the dictionary

I'm named after nothing, though I'm awfully clamorous.
And when I'm not working, your house is less glamorous.
What am I?

Answer

Vacuum cleaner.

An apple tree has apples on it. A storm comes through and there is no longer apples on the tree. But there isn't apples on the ground either.

How can this be so?

Answer

The tree had two apples so when one fell in the storm the tree and ground both had just one apple. So neither had apples just an apple.

A truck drove to a village and met 4 cars.
How many vehicles were going to the village?

Answer

1, only the truck. The cars were going in the opposite direction.

What do you get when you divide 30 by 1/2 and add 10?

Answer

70
30 divide 1/2 = 60 + 10 = 70.

What can travel around the world but stays in one spot?

Answer

A stamp

I end and begin the day,
Without me, you'll pay.
With the aid of sheep,
All my benefits you shall reap.
If I make you miss class,
You shall not pass!
What am I?

Answer

Sleep.

Smaller than four, yet bigger than three, to make it your food, you must add an E.
What is it?

Answer

Pi (3.1415...)