Read the passage below and solve the questions based on it.
Two of my friends Nishant and Rajesh, have the same number of children. Each son of Nishant has 5 times as many sisters as the number of brothers, while each son of Rajesh has as many sisters as the number of brothers. Each daughter of Nishant has twice the number of the brothers but each daughter of Rajesh has twice the number of brothers as the number of sisters.
How many sons does Nishant have?