SOLUTION
This is
Now, both 14 and 28 are divisible by 2. So, 2 will cut 14 to give 7, and 2 will cut 28 to give 14 so you have
Now, only 7 can cut 7 and 14. 7 will cut 7 to get 1 and, 7 will cut 14 to get 2. So we have
Hence the answer is
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