Some birds settled on the branches of a tree. First, they sat one to a branch and there was one bird too many. Next they sat two to a branch and there was one branch too many. How many branches were there?

A 3
B 4
C 5
D 6
E 2

Correct Answer: 3

When the birds sat one on a branch, there was one extra bird. When they sat Two to a branch one branch was extra.Now, we go through the options;Checking option (A);If there were 3 branches, there would be 4 birds. (This would leave one bird without branch as per the question.)When 4 birds would sit Two to a branch there would be one branch free (as per the question.). Hence, the option (A) is correct.

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