Answers

2014-12-13T08:26:04+05:30
Factors of 70 = 1 , 2 , 5 , 7 , 10 , 14 , 35 , 70.

Factors of 35
 = 1 , 5 , 7 , 35.

Common factors of 70 and 35
 = 1 , 5 , 7 , 35.

So 

The greatest common factor 70 and 35 is 35.
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2014-12-14T15:47:08+05:30
As 35 itself is a factor of 70 gcd of 70and35is35

1 5 1