Find the prime factorization of the number 300.

One of the prime factors is missing from the following list:
2, 3, 5, 5
What is the missing prime factor?

1 answer

To find the prime factorization of the number 300, we can start by dividing it by the smallest prime number and continue factoring until we reach all prime numbers.

  1. Start with 300:
    • Divide by 2 (the smallest prime number): \[ 300 \div 2 = 150 \]
    • Next, divide 150 by 2: \[ 150 \div 2 = 75 \]
  2. Now, 75 is not divisible by 2 anymore, so we move to the next prime number, which is 3:
    • Divide 75 by 3: \[ 75 \div 3 = 25 \]
  3. Next, divide 25 by the next prime number, which is 5:
    • Divide 25 by 5: \[ 25 \div 5 = 5 \]
    • Finally, divide 5 by 5: \[ 5 \div 5 = 1 \]

Now, we have completely factored 300. Combining all the divisors, we find:

  • Two 2's (from the two divisions by 2)
  • One 3 (from the division by 3)
  • Two 5's (from the two divisions by 5)

Putting this together, the prime factorization of 300 is: \[ 300 = 2^2 \times 3^1 \times 5^2 \]

You've listed the prime factors as 2, 3, 5, and 5. The only prime factor missing from your list is 5 (this is the factor we need to count twice to account for both occurrences).

Thus, the missing prime factor is: \[ \text{5} \]