What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Can you spot the man between the coffee bean in the picture below ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Give it food and it will live; give it water and it will die.

Four children having five rocks each were playing a game in which they had to throw the rock at a particular solid area in the water. Child 1- Succeeded in throwing three rocks at a solid area but one of the rocks sunk. Child 3 - His aim was so bad that all rocks got sunk. Child 4- He was awesome and none of the rocks got sunk. Child 2 - Was the winner but was struck by a rock in the head and died. Who killed Child 2?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Find the number of squares in the below-given picture.

Which is faster, Heat or Cold ? Explain.