Question

The unit digit in a two digit number is 2 times the digit in tens place if the digit are replaced with each other the number become set in more than the first number what is the first number

Answer 1

Answer:

Step-by-step explanation:

Let the tens digit be a and units digit be b

So, the number is 10a + b

The number obtained by replacing the digits is 10b + a

b = 2a