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?

Solve the riddle below:

If a Chicken says, 'All chickens are liars" is the chicken telling the truth?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

who is silent in the parliament?

What is wrong in the below Picture?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

What does this rebus riddle means ?

What does this Rebus Picture means ?

2, 3, 5, 9, 17, _ What is the next number in the sequence?