Can you fill the blank with the correct number?

6 30 870 756030 _____

Take one out and scratch my head, I am now black but once was red. What am I?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Why is it very easy to weigh a fish?

Which alphabet is a part of our body?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Rearrange the letters in "new door" to make one word.

Count the number of triangles in the below picture?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?