Number Properties – Factors

Here is a relatively easy number properties problem solving question.

Question

What is the largest 3 digit number to have an odd number of factors?
A. 729
B. 943
C. 625
D. 961
E. 841

Correct Answer : Choice D. 961

Explanatory Answer

A perfect square has an odd number of factors.

Of the numbers in the list, the largest 3 digit perfect square is 961 (31²).

Hence, Choice D is the correct answer.