Can you name some countries which do not have the alphabet 'A' in them?

Can you solve below mathematical equation?

2^1234 - 2^1233

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

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?

Decode the movie name from the below picture?

What word is represented by this rebus?

Can you find out the total number of triangles in the given figure?

Find the hidden tiger in the given optical illusion ?

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?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag