Thread: Fundamental Math

How did he get his answer 0.51???

It is a typo, the choice should be 0.26.

another question, why is 15 a prime number? isn't it divisible by 3? and the definition for prime number is "Divisible by ONLY itself AND 1"

15 isn't prime, as it is divisible by 3 and 5.

lol i guess another typo... thanks

Originally Posted by asilvester635

the definition for prime number is "Divisible by ONLY itself AND 1"

If that were the definition of prime number, would that not mean that 1 is a prime number?

Can anyone explain this better to me???? I don't exactly grasp this concept...

Topic: Multiple
Definition: Number multiplied by an integer
Example: The first multiple of 6 is 6, then 12

"A is a multiple of B", where A and B are integers, means that there exist some integer C such that A= BC.

6 is a multiple of 6 because it is equal to 1(6). That is, C= 1. 12 is multiple of 6 because 12= (6)(2). It is the "1" and "2" that causes them to say "first" multiple and "then". The next few multiples are 3(6)= 18, 4(6)= 24, 5(6)= 30, etc.

so can we say that 12 is a multiple of 2??

and can we also way that 12 is a multiple of 12 because it is equal to 1(12). That is, c= 1?

never mind i get it lol thanks