Find the sum of the first three prime numbers that end with the digit 1.

The prime numbers that end with the digit 1 are 11, 31, 41, 61, 71, and so on. Taking the first three of these, we have 11 + 31 + 41 = 83 as the sum of the first three prime numbers that end with the digit 1.

To find the sum of the first three prime numbers that end with the digit 1, we need to identify these numbers and then calculate their sum.

Step 1: List the prime numbers that end with the digit 1:
The prime numbers that end with the digit 1 are: 11, 31, 41, 61, 71, 101, 131, 151, 181, 191, 211, 241, 251, 271, 281, 311, 331, 401, 421, 431, 461, 491, 521, 541, 571, 601, 631, 641, 661, 691, ...

Step 2: Identify the first three prime numbers from the list:
The first three prime numbers that end with the digit 1 are: 11, 31, and 41.

Step 3: Calculate their sum:
Sum = 11 + 31 + 41 = 83

Therefore, the sum of the first three prime numbers that end with the digit 1 is 83.