I can write cow in 13 letters.

Can You?

When does a USA Potato change its nationality?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

It belongs to you, but other people use it more than you do. What is it?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?