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?

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?

What occurs twice in a week, once in a year but never in a day?

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 triangles in the given picture?

I travel all around the world but always stay in the corner. What am I?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

What is 3/7 chicken, 2/3 cat and 2/4 goat?