You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Why is a river so rich ?

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 find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Find the value of "?" in the ball picture Riddle below:

Birbal was jester, counsellor, and fool to the great Moghul emperor, Akbar.
The villagers loved to talk of Birbal's wisdom and cleverness,
and the emperor loved to try to outsmart him.
One day Akbar (emperor) drew a line across the floor.
"Birbal," he ordered, "you must make this line shorter, but you cannot erase any bit of it."
Everyone present thought the emperor had finally outsmarted Birbal.
It was clearly an impossible task.
Yet within moments the emperor and everyone else present had to agree that Birbal had made the line shorter without erasing any of it.
How could this be?

Can you place three balls such that the equation shown in the picture holds true?

Identify the 10 differences between the two given pictures.

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?