I am an odd number. Take away a letter and I become even. What number am I?

Can you solve the below tricky visual equation?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

Where do you go to learn how to make ice cream?

What word does this rebus represent?

meta meta
meta meta

Why 1729 is a magic number? Answer Logically.

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?