Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

A rain drop fell from one leaf to another leaf and lost 1/4th of its volume. It then fell to another leaf and lost 1/5th of the volume. It again fell on another leaf and lost 1/5th of the volume.



This process kept repeating till it fell on the last leaf losing 1/75th of its volume.



Can you calculate the total percentage of loss from the initial volume when the drop has fallen to the last leaf accurate up to two decimal places?

Where do fish keep their money?

Why did the Girl throw the butter out of the window?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

With the help clues provided in the image, can you find the 5 digit key?

How many sides does a circle have?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?