1990 AHSME Problems/Problem 11: Difference between revisions
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How many positive integers less than 50 have an odd number of positive integer divisors? | == Problem == | ||
How many positive integers less than <math>50</math> have an odd number of positive integer divisors? | |||
<math>\text{(A) } 3\quad | |||
\text{(B) } 5\quad | |||
\text{(C) } 7\quad | |||
\text{(D) } 9\quad | |||
\text{(E) } 11</math> | |||
== Solution == | |||
<math>\fbox{C}</math> | |||
== See also == | |||
{{AHSME box|year=1990|num-b=10|num-a=12}} | |||
[[Category: Introductory Number Theory Problems]] | |||
{{MAA Notice}} | {{MAA Notice}} | ||
Revision as of 16:36, 28 September 2014
Problem
How many positive integers less than 
have an odd number of positive integer divisors?
Solution
See also
| 1990 AHSME (Problems • Answer Key • Resources) | ||
| Preceded by Problem 10 |
Followed by Problem 12 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 • 26 • 27 • 28 • 29 • 30 | ||
| All AHSME Problems and Solutions | ||
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