Can you solve this picture maths equation?

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

How many letters are in the alphabet?

When it's bad luck to meet a black cat?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

What is the next number in this matchsticks series riddle?

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?