I can't draw a factor tree here
76 / 2 = 38
38 / 2 = 19
Prime factorization is 2, 2, 19
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76= 2•2•19
76 is an even number so it is divisible by 2, so 2 is the first prime factor.76/2 = 38, and 38 is an even number divisible by 2, so 2is the next prime factor.38/2 = 19, and 19 is a prime number, so 19 is the next prime factor.The prime factorization of 76 is 2 x 2 x 19.
2 x 2 x 19 = 76
2*2*19 = 76
The only common factor is 1, so the answer is 1. (37 is prime, by the way)