Answer:
Hi,
answer C
Explanation:
Which number is both a factor and a multiple of 45? A. 1 B. 15 C. 45 D. 90
The number that is both a factor and a multiple of 45 is C. 45.
To determine whether a number is a factor of 45, we need to see if it divides evenly into 45 without leaving a remainder.
Let's check each option:
A. 1: 1 is a factor of all numbers, including 45. However, 45 is not a multiple of 1 because multiplying 1 by any number will not give us 45.
B. 15: 15 is a factor of 45 because 45 divided by 15 equals 3 with no remainder. However, 45 is not a multiple of 15 because multiplying 15 by any whole number will not give us 45.
C. 45: 45 is a factor of itself because 45 divided by 45 equals 1 with no remainder. 45 is also a multiple of 45 because multiplying 45 by 1 gives us 45.
D. 90: 90 is not a factor of 45 because 45 divided by 90 is not a whole number. 45 is also not a multiple of 90 because multiplying 90 by any whole number will not give us 45.
Therefore, the only number that is both a factor and a multiple of 45 is C. 45.
In summary, the number 45 is both a factor and a multiple of itself, making it the only option that satisfies both conditions.