Question

A father is four times as old as his son. In 3 years, the father will be three times as old as his son. How old is each now?
and The sum of the digits of a three-digit number is 6. The hundreds digit is twice the units digit, and the tens digit equals to the sum of the other two. Find the number.

Answer 1

Answer:

1)x=9

Step-by-step explanation:

age of son =x

age of dad=4x

age of son in 3 yrs=x+3

age of dad in 3 yrs=3(x+3)

=4x=3x+9

=x=9

present age of son =9 yrs

present age if dad =36 yrs

2)x+y+z=6

=2z+(2z+z)+z=6

=2z+3z+z=6

=6z=6

=z=1

no . are 1,2,3