Eight of us go fourth, not back, to protect our king from an attack. What are we?

What month of the year has 28 days?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

I can write cow in 13 letters.

Can You?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

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

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

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?