Answer:
B, C
Explanation:
A) No, factors of 15 = 1, 3, 5, 15... so 45 is not a factor of 15
B) yes, 45 is the third multiple of 15 ( 15×3=45)
C) yes, factor of 45 is the number that divides 45 without leaving any remainders (45÷15=3), therefore 15 is a factor of 45
D) No, multiples must be bigger in value than the actual number because( a multiple of 45) means, the number we get when we multiply 45 by an integer... Here we can't multiply an integer by 45 and get the answer 3