A perfect number can be defined as A number equal to the sum of its proper divisors.
Which of the following is correct?
I. There is only 1, one-digit perfect number
II. There is only 1, two-digit perfect number
III. There is only 1, three- digit perfect number
IV. There is only 1, four- digit perfect number
a. Only I.
b. Only I & II
c. Only I, II & III
d. All of the above
Answer is all of the above. .
n/a
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