What does below pictogram mean?

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

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

Which alphabet is a part of our body?

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

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

I am white when I am dirty, and black when I am clean. What am I?

What is black when you buy it, red when you use it, and gray when you throw it away?

There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?