Question

A man's age is 7 times that of his son in 5 years he will be 4 times as old as his son what was the present age of the man and his son

Answer 1

LET THE AGE OF SON BE X YEARS AND THE AGE OF FATHER BE 7X YEARS.
AFTER FIVE YEARS THEIR AGE
AGE OF SON 5X YEARS AND FATHER 11X YEARS.
NOW ACCORDING TO QUESTION
4×5X=11X
4=11X÷5X
4=11X×1÷5
4=2.5X
X=4÷2.5X
X=2.5
NOW PRESENT AGE OF SON 2.5 YEARS OLD AND AGE OF FATHER IS 7X=7×2.5=17.5 YEARS OLD