Spot 5 differences in two Christmas tree below:

Solve the following series:
AZ, GT, MN, __, YB

I am sure no one can have two things for dinner. what are they?

What do you call a fish without an eye?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?

What is black when you buy it, red when you use it, and gray when you throw it away?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Which country gets ill every time?