The factors of 60 are:
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
The factors of 70 are:
1, 2, 5, 7, 10, 14, 35, 70
The factors of 80 are:
1, 2, 4, 5, 8, 10, 16, 20, 40, 80
The GCF of 60, 70, and 80 is 10. One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them. The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60. The factors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70. The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, and 80. The common factors are 1, 2, 5, and 10. Therefore, the greatest common factor is 10.
The average is 80.
The result of the equation - 130 plus 80 plus 60 plus 70, is found as follows;130 + 80 + 60 + 70= ( 130 + 80 ) + 60 + 70= 210 + ( 60 + 70 )= 210 + 130= 340Answer = 340
The result of the equation - 70 plus 90 plus 60 plus 80, is found as follows; 70 + 90 + 60 + 80 = ( 70 + 90 ) + 60 + 80 = 160 + ( 60 + 80 ) = 160 + 140 = 300 Answer = 300
The result of the equation - 130 plus 70 plus 60 plus 80, is found as follows;130 + 70 + 60 + 80= ( 130 + 70 ) + 60 + 80= 200 + ( 60 + 80 )= 200 + 140= 340Answer = 340
60
60 and 70 have 4 common factors (divisors): 1; 2; 5 and 10
10, 20, 30, 40, 50, 60, 70, 80 and 90.
The factors of 70 are: 1, 2, 5, 7, 10, 14, 35, 70The factors of 20 are: 1, 2, 4, 5, 10, 20The common factors are: 1, 2, 5, 10
just subtract 1. 90-1=80-1=70-1=60 and it continues
Prime factors of 60 are: 2, 3 and 5 Prime factors of 70 are: 2, 5 and 7
The factors of 70 are: 1, 2, 5, 7, 10, 14, 35, 70The factors of 80 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80