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?

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

I have branches, but no fruit, trunk or leaves. What am I?

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?