13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

Solve the puzzle by telling what does below picture means.

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Can you find out the remainder when 3^300 is divided by 5?

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C