- 1. In Video 1, which number is not considered a prime number?
- 2. In Video 1, a prime number is a number that can divide evenly by __ and itself.
- 3. In Video 1, how many "new" numbers were there from 1 to 20?
- 4. In Video 2, how many prime numbers were used to sieve the rest of the primes from 1 to 100?
- 5. In Video 2, how many prime numbers are there from 1 to 100?
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