Question

The hundreds digit of a number is twice the ones digit and the tens digit is 3 more than the digit at the ones place.If the sum of the number and the tens digit is 457,find the number.

Answer 1

Let the hundreds digit is x and tens is it is y and ones digit is z

so no. is 100x+10y+z

as given

x=2z

Y=z+3

and

100x + 10y +z + y =457

200z + 10z + 30 + z + z + 3 = 457

212z + 33 = 457

212z = 424

z= 2

so

x= 2z=2 x 2 = 4

y=z+3=2+3=5

so the no. is 452