The prime factor decomposition of 168 is: 23 x 3 x 7
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I used a factor tree. 165 55,3 11,5,3
Decomposition means to break down. All composite numbers can be expressed as unique products of prime numbers. This is accomplished by dividing the original number and its factors by prime numbers until all the factors are prime. A factor tree can help you visualize this.Example: 210210 Divide by two.105,2 Divide by three.35,3,2 Divide by five.7,5,3,2 Stop. All the factors are prime.2 x 3 x 5 x 7 = 210That's the prime factorization of 210.
The prime factorization of 165 is 3 x 5 x 11
Common factors of 165 and 193 are: 1.
35 can be a factor, but it is not prime.