Question

The sum of the digits of a two-digit number is 11. The number got by interchanging the digits is 27. more than the original number. The number is :

• A. 29
• B. 38
• C. 47
• D. 56

Answer 1

Answer:

C. 47

x+y = 11 original number = 10x + y 10y + x = 10x + y + 27 9y-9x = 27 9y+9x=99 18y=126 y=7 x=4 original number = 47