Answers

2015-06-30T22:16:03+05:30
Factorize them first.
406=2*7*29. 
870=2*3*5*29 
Now take the biggest power of each prime factor which is common to both and multiply them.
Here we see they are 2 ^{1} and 29^{1} .
So G.C.D=2*29=58.
Ans:58.
2 3 2
2015-07-01T11:15:50+05:30
406= 2x7x29
870=2x3x5x29

GCD= 2 x 29
        = 58
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