Which number has the most factors?
A. 12
B. 18
C. 25
D. 70
E. 100
When figuring out how many factors a number has, be sure to include the number itself and 1. Try each choice in turn:
* (A) There are 5 factors of 12: 1,3,4,6,12.
*(B) There are 6 factors of 18: 1,2,3,6,9, and 18.
*(C) There are 3 factors of 25: 1,5, and 25.
*(D) There are 8 factors of 70: 1,2,5,7.10,14,35,and 70.
*(E) There are 9 factors of 100: 1,2,4,5,20,25,50, and 100.
Thus 100 has the most factors.