I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

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

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

Find the Goldfish below the given Image.

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?