Dilu's Library

Dilu is a young boy who loves mathematics. He recently learned how to code. He was interested in sol...

Elementary Arithmetic

When Shakib was little, his mother used to help him with his studies. Usually, around 7 PM in the ev...

Genius Needs Help

You all know Emrul bhai, right? He is a genius guy. He knows how to add two integer numbers and so d...

Mirror World

Imagine a world inside mirror, where everything becomes reverse. Left hand becomes right hand, right...