What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

If two's company, and three's a crowd, then whats four and five ?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

When does a USA Potato change its nationality?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

I can write cow in 13 letters.

Can You?