Can you find out which number multiplied by itself will give the output as 12345678987654321?

Can you spot the hidden girl in the picture below?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Identify The phrase in the picture.

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

Solve the counting riddle by identifying the number of triangles in the given picture.

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?

I have no life, but I can die. What am I?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?