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Q: What is the GCF of 43 and 86?

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Since 43 is a factor of 86, it is automatically the GCF.

The GCF is 43.

43 X 2 equals 86. 43 is a prime number. 43 is the GCF of 43 and 86.

The GCF of 86 and 30 is 2 just. You are left with 43 and 15 respectively. 43 and 15 don't have any further factors in common aside from 1.

The gcf of 43 and 129 is 43, so the two digit number must be 43; howeverthe gcf of 86 and 129 is also 43, so the two digit number must be 86; howeverthe gcf of 22 and 86 is only 2 and the gcf of 22 and 43 is only 1, no neither 43 nor 86 has a gcf of 43!Hint:You cannot have a COMMON factor with only onenumber - common implies at least two numbers.The greatest COMMON factor is the largest number that divides all the numbers and depends upon all the numbers - it makes no sense to ask for the greatest COMMON factor of a single number.

The GCF is 43.

The GCF is 43.

The factors of 86 are:1, 2, 43, 86The factors of 129 are:1, 3, 43, 129The factors of 215 are:1, 5, 43, 215The common factors are:1, 43The Greatest Common Factor (GCF) is: 43

53 is already prime. 2 x 43 = 86 No common prime factors; the GCF is 1.

The GCF of 36 and 86 is 2. The prime factorization of 36 is 2*2*3*3 The prime factorization of 86 is 2*43 So the GCF is 2.

The GCF of 86 and 154 is 2. 86=2x43 154 = 2x7x11 Now the GCF is 2 since 43 does not occur in the prime factorization of 154 and 7 and 11 do not appear in the prime factorization of 86.

The LCM is 86.

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