What is the coolest letter in the alphabet?

What does this rebus mean?

O
N
C
E
TIME

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

If your uncle’s sister is not your aunt, what relation is she to you?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

When can we add 2 to 11 and get 1 as the correct answer?