6 is the first perfect number. What is the next perfect number?

A number when divided by 14 leaves a remainder 9. If the same number is divided by 7, what can be the remainder?

How many factors are there for the resulting number 1 x 7 x 37 x 41?

A ray of light falls on a plane mirror with an angle of incidence equal to 60°. The angle of reflection is

There are 50 children in a village out of 450 people,the part of adult is