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?

A dying old man wants to divide his entire land between his only two sons. Since his only wish is to treat them as equal as both of them have been too good to him, he wants to divide his land equally between them. The problem is that the land is significantly irregular in shape and thus there is no choice of cutting them into two equal halves.

Can you help him divide the land in a manner that both of his sons will be happy?

No matter how little or how much you use me, you change me every month. What am I?

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

Who always enjoys poor health?

Solve the mathematical equation in the picture below.

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?

What can you catch but never throw?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Find out the number of circles in the given picture having Illusion