Which pair of numbers is relatively prime?
A. 143 and 63
B. 43 and 172
C. 22 and 143
D. 110 and 77

Question

Which pair of numbers is relatively prime?
	A.	143 and 63 
	B.	43 and 172
	C.	22 and 143
	D.	110 and 77

mathmale · Answer

I'd strongly suggest that y ou look up the mathematical definition of "relatively prime," so that you 'd know precisely what y ou're looking for.

zepdrix · Answer

So you're trying to determine which pair of numbers `share no factors`.

How bout option D?
Do you know how to list some factors?
77 = 11*7
How bout 110?

ilovehorses14 · Answer

Which of the following is a composite number?
	A.	23
	B.	11
	C.	25
	D.	19

ilovehorses14 · Answer

A composite number is a positive integer that has at least one positive divisor other than one or the number itself. Any integer greater than one that is not a prime number is a composite number, while the number one is a unit; it is neither prime nor composite.

ilovehorses14 · Answer

i dont have a book so plz help with the question i just poted

ilovehorses14 · Answer

posted i meant

zepdrix · Answer

25 ends in a 5,
is there any way to factor this number into something * something?

How bout 23? any ideas? :d

zepdrix · Answer

11 = 11*1,
clearly 11 is not a composite number.
There are no other factors of 11.

ilovehorses14 · Answer

i looked up wat the factors are for 23 and it said 1 and 23

ilovehorses14 · Answer

The factors of 25
Answer : 1,5,25,

ilovehorses14 · Answer

ok so 25 11 and 23 are prime so i guess the only one that is not prime is 19

ilovehorses14 · Answer

am i right cuz i looked them up

ilovehorses14 · Answer

nvm 19 is a prime number

ilovehorses14 · Answer

im going to go with 25

ilovehorses14 · Answer

Which pair of numbers is relatively prime?
	A.	5 and 75
	B.	12 and 51
	C.	7 and 20 
	D.	15 and 21

zepdrix · Answer

Yes, 25 has 5 as a factor.
So it is a composite number :)

zepdrix · Answer

5 and 75 both end in 5,
so they share a factor of 5.
They are not relatively prime.

ilovehorses14 · Answer

so a is not right

zepdrix · Answer

A bunch of the options have 3 as one of their factors.
Here is an easy place to start maybe.
Start with the one that you know is a prime number.

7 is a prime number.
So 7 and 20 are relatively prime unless 20 has a factor of 7.
Does 20 = 7*(something)?

ilovehorses14 · Answer

Which pair of numbers is relatively prime?
	A.	108 and 57 
	B.	21 and 183
	C.	55 and 121
	D.	60 and 151

ilovehorses14 · Answer

anyone know the answer

ilovehorses14 · Answer

q .5 Which pair of numbers is relatively prime?
	A.	102 and 321
	B.	10 and 45
	C.	3 and 51
	D.	35 and 72