Replace the question mark with the number below given a simple math problem.

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

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Remove two matchsticks to make the below equation correct.

Can you find the thief by just looking at the picture below?

Look at the picture and find out which square is not linked with any of the other squares.

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?