The GCF is 13.
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13The GCF is 13.
To find the highest common factor (HCF) of 91, 143, and 156, we need to first find the prime factors of each number. The prime factors of 91 are 7 and 13, of 143 are 11 and 13, and of 156 are 2, 3, and 13. The HCF is the product of the common prime factors raised to the lowest power they appear in any of the numbers. Therefore, the HCF of 91, 143, and 156 is 13.
It is: 13
The GCF is 13.
The GCF is 13.