You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Whats the next number in the below number sequence pattern.

A sundial has the fewest moving parts of any timepiece. Which has the most?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?