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?

What happened when the wheel was invented?

What is the word or phrase?

A landlord calls both of his sons and tells them that their horses will now decide who will transfer the inheritance. He tells them to race along the land till the end and the one whose horse will be slower will win and be the heir to all the property.

Both of them keep wandering for days but to no result. Then they ask a wise man regarding it. The man advises them on the matter after which they jump on the horses and race as fast as they can till the end. Why did they do it?

What did the wise man say?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

What can you deduce from the following BrainBat?

CRY
LMKI

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.