Question

What is the prime factorization of 225?
A. 2 x 3 x 5 x 5
B. 9 x 25
C. 3 x 3 x 5 x 5

Answer 1

15*15=225

Answer 2

C

Answer 3

C yes jimmyrep right

Answer 4

both B and C multiply to 225:
9x25=225
3x3x5x5=225
but only C has all prime numbers, so that is the PRIME factorization.
9=3x3 so not prime
25=5x5 so not prime

Answer 5

A is just plain wrong because it doesn't even make 225
2 x 3 x 5 x 5=150

Answer 6

i dont know if your aware of this but a quick way to find if a number is divisible by 3 is to keep adding its digits auntil you have one digit
and it this is 3 6 or 9 then you have a multiple of 3.

so 2 + 2 + 5 = 9 - its divisible by 3

Answer 7

Thank you all! (:

Answer 8

yw