Q: Why is 2 a prime factor of 70?

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Greatest Prime Factor of 70The prime factorization of 70 is 2 X 5 X 7, so the greatest prime factor in the prime factorization of 70 is 7.

2 and 7 are prime numbers less than 10 that are factors of 42 and 70.

Use a factor tree. 70 35,2 7,5,2 2 x 5 x 7 = 70

It is: 2*5*7 = 70 and no exponents are needed

(140) = 2 * (70) (70) = 2 * (35) (35) = 5 * 7 Prime factors of 140: 2,2,5 and 7

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Greatest Prime Factor of 70The prime factorization of 70 is 2 X 5 X 7, so the greatest prime factor in the prime factorization of 70 is 7.

2 x 5 x 7 = 70

2 x 5 x 7 = 70

2 x 5 x 7 = 70

Any of the numbers except for 2, 5 and 7 which are prime factors of 70

2 and 7 are prime numbers less than 10 that are factors of 42 and 70.

The prime factors of 70 are 2, 5, and 7. The prime factors of 90 are 2, 3, 3, and 5. The prime factors that 70 and 90 have in common are 2 and 5. The greatest common factor of 70 and 90 is the product of the prime factors they have in common, so it is 2 x 5 = 10.

As a product of its prime factors: 2*5*7 = 70

The greatest common factor of 70 and 80 is 10. The prime factorization of 70 is 2*5*7 The prime factorization of 80 is 2*2*2*2*5 The GCF is 2*5 = 10

Use a factor tree. 70 35,2 7,5,2 2 x 5 x 7 = 70

10 is not prime and can't be a prime factor.

14 One way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 28 are 1, 2, 4, 7, 14, and 28. The factors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70. The common factors are 1, 2, 7, and 14. Therefore, the greatest common factor is 14. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 28 are 2, 2, and 7. The prime factors of 70 are 2, 5, and 7. The prime factors in common are 2 and 7, so the greatest common factor is 2 x 7 = 14.