A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I can be cracked, made, told, and played. What am I?

Can you find the six hidden animals in the picture below?

Find the next number in the following series:
6, 14, 26, 98, __?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

I always drive my customer away.

Who am I?