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?

Which alphabet letter is a question?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

Find the missing letter in the last circle logically in the given below picture.

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?

Can you make a six-letter word using the letters N, A and B ?

Who has married many women but was never married?

What jumps when it walks and sits when it stands?

What have one eye but still cannot see?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?