I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

What is so fragile that saying its name breaks it?

Do You See It?

Which tank will fill first?

What does this rebus picture identify?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

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.

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?