what is the prime factorization of 91? enter your answer as a product of prime numbers, like 2 × 3, or as a…
what is the prime factorization of 91? enter your answer as a product of prime numbers, like 2 × 3, or as a single prime number, like 17.
Answer
Explanation:
Step1: Test divisibility by prime numbers
Start with the smallest prime number 2. 91 is odd, so it's not divisible by 2.
Step2: Check divisibility by 3
The sum of digits of 91 is 9 + 1=10, which is not divisible by 3, so 91 is not divisible by 3.
Step3: Check divisibility by 5
It doesn't end in 0 or 5, so it's not divisible by 5.
Step4: Check divisibility by 7
91÷7 = 13.
Step5: Analyze factors
Both 7 and 13 are prime numbers.
Answer:
7×13