How many odd integers from 1 to 50 (both inclusive) have odd number of factors? Pick one
A) 13	B) 4	C) 5	D) 6	E) 7
Integers having odd number of factors will be perfect squares. Odd numbers will have odd perfect squares. Thus, the possible values for the perfect squares are :   1,9,25,49 and the corresponding integers are 1,3,5,7 (more than 3). Thus 4 is the correct answer .
<result>B</result>
How many odd integers from 1 to 50 (both inclusive) have odd number of factors?