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

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

Some friends went on a vacation to a resort. It was raining heavily and it kept raining for thirteen days.

When it rained in the morning, the afternoon was beautiful and when it rained in the afternoon, the day was blessed with a clear morning.

Overall, the friends experienced eleven nice mornings and twelve nice afternoons. Can you find out the number of days they spent on vacation?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

What is the next number in the series?

15 29 56 108 208 ?

Replace the question mark with the correct number below.