The quotient and remainder of a two digit number divided by 12 are the same. How many such two digits are there? (requirements: algorithm, process, why,) fast

The quotient and remainder of a two digit number divided by 12 are the same. How many such two digits are there? (requirements: algorithm, process, why,) fast

The remainder is less than the divisor
1) The remainder and quotient are both 1
The minimum of the two digits is: 1 × 12 + 1 = 13
2) The remainder and quotient are both 7
The maximum of the two digits is: 7 × 12 + 7 = 91
There are seven such double digits