Spot 5 differences in two Christmas tree below:

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

The Little ant seems to be always confused. Do you know why?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

What is next number in the pattern below:

131 517 192 123 ?