What is the gcf of 43 and 70?

Answer 1

Greatest common factor can be found by the method of prime factorization i.e. by expressing each number as a product of prime number.

P.F. of 43 = 43x1

P.F. of 70 = 2x5x7x1

Clearly, only 1 is the number which divide both 43 and 70. Therefore, gcf =1

Answer 2

The GCF is 1.