Which of the following is a prime #?
a.2
b.19
c.37
d.51
e.67
I choose 2. But the book answer is 51. The book says:( 2,19,37, and 67 are prime #'s) 3x17=51, so it is not prime.
I forgot what prime #'s mean that's why I choose anything like 2.
help me.
A prime number is a number that can only be divided by 1 and itself. The first 30 prime numbers are:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113
http://en.wikipedia.org/wiki/Prime_number
Probably your question is which one is NOT a prime number.
Yes your right. I made a mistake. the word problem says not a prime #.
No problem, we all make mistakes sometimes! To determine whether a number is prime or not, you need to check if it can be divided evenly by any number other than 1 and itself.
Let's go through the given options:
a. 2 - This is indeed a prime number because it can only be divided by 1 and 2.
b. 19 - This is also a prime number since it cannot be divided evenly by any other number.
c. 37 - Again, this is a prime number because it has no divisors other than 1 and 37.
d. 51 - As the book correctly points out, 51 is not a prime number. It can be divided evenly by 3 and 17, as 3 x 17 equals 51.
e. 67 - This is a prime number because it can only be divided by 1 and 67.
Therefore, the correct answer is d. 51, as it is the only number given that is not a prime number.