Question

solve it.........6...

Answer 1

Let 100x + 10y + z  be the 3 digit number.
y = 3z
x = 4z 
x + y + z = 16
4z + 3z + z = 16
             8z = 16
               z = 2
               x = 8
               y = 6
The number is 862

Answer 2

Let the units digit be x
Then, tens digit = 3x
and hundreds digit = 4x
Then the number is (100 × 4x) + (10×3x) + (x)
Sum of digits = x + 3x + 4x
=> 16 = 8x
=> x = 16 / 8
=>x = 2

So, the number is (100× 4 (2) ) + (10× 3 (2) ) + (2) =800 + 60 + 2 = 862