The sum of the digits of a three digit number is 2. After adding 10 to the number the sum of the first two digits become 2. Please find the number.
There are only three three-digit numbers that satisfy the 1st condition.
These are,
110
101
200
Now add 10 to each possible number.
110 + 10 = 120 (sum of 1st 2 digits = 3)
101+ 10 = 110 (sum of 1st 2 digits = 2)
200+ 10 = 210 (sum of 1st 2 digits = 3)
So, the number is: 101