This question is on my daughter's homework--Which shows 45 as a product of primes?
(A) 15 x 3 (B) 3 x 5 x 3 (C) 1 x 5 x 9 (D) 1 x 3 x 15
Please help
B. 3 and 5 are primes.
Reject:
A and D: 15 = 3*5 and so 15 is not prime.
C: 9 = 3*3 and so 9 is not a prime.
45 = 32 x 5
45 = 3 x 3 x 5
Since there are infinitely many primes, there are infinitely many numbers that are products of 3 primes.
Factor both numbers into primes. Circle any common primes and multiply them/ 45=3x3x5 54=2x3x3x3 3x3=9 GCF
45 = 3 x 3 x 5
only one has and that is the number 3
25 primes.
Yes, there are an infinite number of twin primes.
The larger number of the fourth set of twin primes is 19.
Believe it or not, the number of prime numbers beginning with 8 is infinite.
45 15,3 5,3,3 3 x 3 x 5 = 45
there are 13 primes not 5.