The prime numbers between 300 and 350 are:
307 311 313 317 331 337 347 349
The sum of these numbers is 2612.
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There are 99 of them ... all the numbers you say as you count from 301 to 399.
The prime numbers between 200 and 300 are: 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293
202, 212, 222, 232, 242, 252, 262, 272, 282, and 292 are the palindromic numbers between 200 and 300. NONE of them are prime, since they must all end in 2 they are even and so are divisible by 2, so they are not prime.
The prime factors of 350 are: 2, 5, 7
Here they are: 353 359 367 373 379 383 389 397