Question

When you reverse the digits in a certain two-digit number, you decrease its value by 18. What is the number is the sum of its digits is 4?

Answer 1

Answer:

31

Step-by-step explanation:

Acc. to the given problem let x be the ten's place digit and y be one's place digit.

So x + y = 4 (given)

given number is in the form 10*x + y

after reversing 10 * y + x

their difference is 18 (given)

∴ (10*x + y) - (10*y + x) = 18

Solving this equation we get x = 3 and y = 1.