Find the next number in the sequence

5 12 24 36 ?

A pet show was happening in my locality. I went down along with my kids. In that show, I noticed that all except two of the entries were cats. All except two were dogs and all except two were Monkeys.

Can you find out how many of each animals were present in that pet show?

Can you replace the question mark with the correct number in the below table sequence?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

Imagine you are in a room with no windows or doors. How will you get out?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

Which alphabet letter is a question?