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# What number is divisible by 3 6 and 9?

Updated: 8/30/2023

Wiki User

β 10y ago

yes

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Absolutely not! If it is divisible by 9 it must be divisible by 3.

Here, if you want it, is a proof:

x is divisible by 9 implies that x = 9*y for some integer y.

Now 9 = 3*3, so writing 3*3 instead of 9 gives

x = (3*3)*y

so, by the associative property of multiplication,

x = 3*(3*y)

and then, by the closure of multiplication of integers, 3*y is also an integer. Say, z, for example.

That is to say, x = 3*z

which is equivalent to saying that x is divisible by 3.

Wiki User

β 11y ago

Wiki User

β 14y ago

Because 9 is divisible by 3, this is like the rule where if a number is divisible by 2 and 3 it is also divisible by 6.

Wiki User

β 11y ago

Because any number that has 6 as a factor will also have the factors of 6 as factors.

Wiki User

β 11y ago

Multiples of multiples of three are also multiples of three.

Wiki User

β 11y ago

3, 6, 9, 12, 15 and just keep adding three until you get to infinity.

Wiki User

β 7y ago

No. 5 and 7 are odd numbers.

Wiki User

β 7y ago

The set of multiples of 9.

Wiki User

β 10y ago

18

Anonymous

Lvl 1
β 3y ago

because three times one equals three

Anonymous

Lvl 1
β 3y ago

72