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Mathematics 21 Online
OpenStudy (anonymous):

PLLEAASEEE HELPPPP!! Find a counterexample to the following conjecture: A multiple of 5 ends in a 5.

OpenStudy (freckles):

What are numbers that are divisible by 5?

OpenStudy (freckles):

just name a few

OpenStudy (anonymous):

15,25,50

OpenStudy (freckles):

Does 50 end in 5?

OpenStudy (freckles):

You just found a counterexample.

OpenStudy (anonymous):

Oh oops, no it doesnt. So the answer would be 15 and 25?

OpenStudy (freckles):

50 is a multiple of 5 but ends in 0.

OpenStudy (freckles):

Nope you are to find a counterexample and you just did by saying 50.

OpenStudy (freckles):

The answer is: Counterexample: 50 is a multiple of 5 but ends in 0

OpenStudy (anonymous):

Ohh!!! Okay, i get it now! Thank you sooo much!

OpenStudy (freckles):

Therefore the statement: A multiple of 5 ends in a 5 is false (since it is not always true)

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