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

Which number should replace the question mark?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

Spot what is wrong here in below Picture?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

A family is trapped in a jungle. There is a bridge which can lead them to safety. But at one time, the bridge can only allow two people to pass through. Also, all of them are afraid of the dark and thus, they can't go alone.

Father takes 1 minute to cross, the mother takes 2 minutes, the son takes 4 and the daughter takes 5 minutes. While crossing the time taken will be according to the slower one. How can they all reach the other side in the minimum possible time?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?