Question

Find a counterexample to show that the conjecture is false. Any number that is divisible by 5 is also divisible by 3.
A.

45

B.

60

C.

30

D.

25

Answer 1

D shows this

Answer 2

is 25 divisible by 5?

Answer 3

are you kidding

Answer 4

yes 5 x 5

Answer 5

it goes in 5x's

Answer 6

Is 25 divisible by 3?

Answer 7

no..

Answer 8

So if someone says to you, "Any number that is divisible by 5 is also divisible by 3", you can say, "Your conjecture is wrong. Here is a counter example that proves it is false. Twenty-five is divisible by 5 but not by 3/"

Answer 9

makes sense, I understand ! thanks @Mertsj and @light78978

Answer 10

yw