Can you find out the remainder when 3^300 is divided by 5?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

In the image below, can you find the value of an angle(y)

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

A sundial has the fewest moving parts of any timepiece. Which has the most?

The more it dries, the wetter it becomes. Can you tell what it is?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?