What Adam and Eve do not have but the rest of the people have?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

I have two sand hourglasses:
1. A 7 minute one and
2. An 11-minute one.

Using just these 2 sand hourglasses, how can I measure time as 15 minutes?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

Why Wine Glass Stem is so long?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Why are all black people so quick ?

What does the below mathematical rebus mean?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?