Question

In a two digit numbers​

Answer 1

Answer:

Step-by-step explanation:

There are 90 numbers of two digits. The smallest two-digit number is 10 and greatest two-digit number is 99. In a two-digit number, one digit is placed at ten's place and the other at one's place.

Answer 2

Answer:

let , the ten place digit be x

the unit place digit be 2x+1

the number is =10x+2x+1 =12x+1

if the digits are interchanged then the number will be= 10(2x+ 1)+x=21x+10

difference between two numbers

= 21x +10 - 12x-1 = 9x +9

do, 9x+9 = 12x+1 -1

or, 3x = 9

or, x = 3

the original number is 37