How is the moon similar to a dollar?

what does the below math rebus puzzle mean?

Why is a river so rich ?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

Rearrange the letters in "new door" to make one word.

During an interview, the interviewer ordered hot coffee for the candidate to relieve the stress. The coffee was kept before him. After a minute, the interviewer asked him, 'What is before you?' He replied 'Tea'.

The candidate was selected immediately. Why?

What has a bottom at the top?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

I shave every day, but my beard stays the same. What am I?