Question

In a three digit number the hundreds digit is twice the tens digit by the unit digit is twice the tens digit also the sum of its digit is 8 find the number

Answer 1

1) u=3t

2) h=2t

3) u+t+h=18

substitute eqn

t+3t+2t=18

6t=18

t=3

and

u=3t

=3×3

=9

h=2t

=2×3

=6 

and hence,639 is the answer