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

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

What two things can you never eat for breakfast?

Can you name some countries which do not have the alphabet 'A' in them?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

You bought me for dinner but never eat me. What am I?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
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?

How many triangles can you count in the figure given?