The next number in the sequence is 23.
To understand why, let’s look at the given sequence: 11, 13, 17, 19. These are all prime numbers, which means they are numbers greater than 1 that have no positive divisors other than 1 and themselves. The prime numbers follow a specific pattern, but they are not evenly spaced apart.
After 19, the next prime number is 23. This is determined by checking each subsequent number after 19 to see if it is prime. The number 20 is divisible by 2, so it’s not prime; 21 is divisible by 3; 22 is divisible by 2. However, when we reach 23, we find that it has no divisors other than 1 and 23 itself, confirming that it is indeed prime.
So, the complete sequence of prime numbers up to that point is 11, 13, 17, 19, and the next one is 23.