(A) Is 111 prime or composite?
(B) What is the least number that has exactly 5 factors? List the factors.
2006-10-02 13:31:15 · 4 answers · asked by Emily 2 in Education & Reference ➔ Homework Help
111. The sum of the digits is 3, which is a multiple of 3.
So 111 is divisible by 3 and composite.
The least number with exactly 5 factors is 32 = 2*2*2*2*2.
2006-10-02 14:11:12 · answer #1 · answered by steiner1745 7 · 0⤊ 0⤋
to find prime factorization look for an even ending ending in 5 or 0 if it adds up to 9 this means it composite then check for other stuff
i was thinking its either 24 or 30 but they both have 6 so hmmmm
2006-10-02 20:34:58 · answer #2 · answered by Momo70707 5 · 0⤊ 0⤋
(a) 111 is divisible by 3, so it is not a prime number.
(b) I believe it may be 32--all five factors are 2. (2X2X2X2X2=32)
2006-10-02 20:50:29 · answer #3 · answered by knowitall 5 · 0⤊ 0⤋
(a) prime
(b) sorry cant help with that one
2006-10-02 20:43:51 · answer #4 · answered by Future Basketball Playa #3 2 · 0⤊ 0⤋