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?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Make a sentence consisting of three words that have the whole alphabet.

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

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?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Can you count the number of triangles in the given picture?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle