MathDB
Problems
Contests
National and Regional Contests
USA Contests
MAA AMC
AMC 12/AHSME
1990 AMC 12/AHSME
11
Number of such integers
Number of such integers
Source:
March 31, 2006
Problem Statement
How man y positive integers less than
50
50
50
have an odd number of positive integer divisors?
(A)
3
(B)
5
(C)
7
(D)
9
(E)
11
\text{(A)}\ 3 \qquad \text{(B)}\ 5 \qquad \text{(C)}\ 7 \qquad \text{(D)}\ 9 \qquad \text{(E)}\ 11
(A)
3
(B)
5
(C)
7
(D)
9
(E)
11
Back to Problems
View on AoPS