9 , 161+5 , 794+11 , 416

Add 161 and 5.

9,166,794+11,416

Add 794 and 11.

9,166,805,416

9,166,805,416

The factors for 9 are all numbers between 1 and 9, which divide 9 evenly.

Check numbers between 1 and 9

Find the factor pairs of 9 where x⋅y=9.

xy1933

List the factors for 9.

1,3,9

1,3,9

The factors for 166 are all numbers between 1 and 166, which divide 166 evenly.

Check numbers between 1 and 166

Find the factor pairs of 166 where x⋅y=166.

xy1166283

List the factors for 166.

1,2,83,166

1,2,83,166

The factors for 805 are all numbers between 1 and 805, which divide 805 evenly.

Check numbers between 1 and 805

Find the factor pairs of 805 where x⋅y=805.

xy1805516171152335

List the factors for 805.

1,5,7,23,35,115,161,805

1,5,7,23,35,115,161,805

The factors for 416 are all numbers between 1 and 416, which divide 416 evenly.

Check numbers between 1 and 416

Find the factor pairs of 416 where x⋅y=416.

xy14162208410485213321626

List the factors for 416.

1,2,4,8,13,16,26,32,52,104,208,416

1,2,4,8,13,16,26,32,52,104,208,416

List all the factors for 9,166,805,416 to find the common factors.

9: 1,3,9

166: 1,2,83,166

805: 1,5,7,23,35,115,161,805

416: 1,2,4,8,13,16,26,32,52,104,208,416

The common factors for 9,166,805,416 are 1.

1

The GCF (HCF) of the numerical factors 1 is 1.

1

Find the HCF 9 , 161+5 , 794+11 , 416