There are 33 similar chocolates to be distributed among 7 children such that each child gets distinct and natural number of chocolates. In how many wa...

A regular tetrahedron of length 12 cm is accommodated in a sphere such that all its vertices touch the sphere. Find the radius of the sphere. ...

What is the remainder when 7777777.....201 digits is divisible by 41? Can we solve it using Euler's theorem?