Question

Any number that is divisible by 3 is also divisible by 9 find a counter example to show the the conjecture is false

45

48

27

18

Answer 1

What is Divisibility

What is Divisibility? When we say a number is divisible by another number, we mean that if we divide a whole number by another whole number that the result will be a whole number. For example, 267 is divisible by 9, since 267÷9=29 267 ÷ 9 = 29.

First its 3's turn

45/3= 15

48/3= 16

27/3= 9

18/3= 6

Now its 9's turn

45/9= 5

48/9= 5.33333333333

27/9= 3

18/9= 2

Answer

The counter-example to show the conjecture wrong is 48