Question

Seven times of a two-digit number is equal to four times the number obtained by reversing its digit. If the SUM of the digits of the original number is 3,find the number.

Answer 1

Step-by-step explanation:

When we check the first given condition, 7 times the original number is equal to 4 times the reversed number. 7(36) = 252 = 4(63) Verified. The second condition, the difference between digits 6 – 3 = 3 Verified.

Answer 2

Answer:

let the number is 10x+y

so,

7(10x+y)=4(10y+x)

=> 70x+7y=40y+4x

=> 70x-4x=40y-7y

=> 66x=33y

=> 66x/33=y

=> 2x=y

again,

x+y=3 ( putting the value of y)

=> x+2x=3

=> 3x=3

=> x=3/3=1

y=2.1=2

the number is 10.x+y=10.1+2=10+2=12