18 is divisible by 1, 2, 3, 6, 9, 18.
18
Using the tests for divisibility:Divisible by 3:Add the digits and if the sum is divisible by 3, so is the original number: 6 + 8 + 4 = 18 which is divisible by 3, so 684 is divisible by 3Divisible by 6:Number is divisible by 2 and 3: Divisible by 2:If the number is even (last digit divisible by 2), then the whole number is divisible by 2. 684 is even so 684 is divisible by 2.Divisible by 3:Already shown above to be divisible by 3. 684 is divisible by both 2 & 3 so 684 is divisible by 6Divisible by 9:Add the digits and if the sum is divisible by 9, so is the original number: 6 + 8 + 4 = 18 which is divisible by 9, so 684 is divisible by 9Thus 684 is divisible by all 3, 6 & 9.
18, 24, 32, 36
The common multiples of 18 and 72 are 72, 144, 216, 288, 360, 432, 504, 576, 648, 720, and so on. Anything divisible by 72 is divisible by 18 since 18 is one of the factors of 72.
20 is not divisible by 18.
18 is not divisible by 5 and 7.
138 is not divisible by 18.
-- Neither 2 nor 5 is divisible by 18. -- 18 is divisible by 2, but not by 5.
All multiples of 18 are divisible by 9. Not all multiples of 9 are divisible by 18.
18 is divisible by 1, 2, 3, 6, 9, and 18.
18, 36, 54, 72,...and all other multiples of 18 are divisible by 18.
The numbers which divide 2 and 9 are indirectly divisible by 18.
is 18 divisible by 9
Any even number divisible by 9, if the sum of the digits is divisible by 9. If it's an even number divisible by 9, it's divisible by 18.
Yes. The last digit is 0 so it is even and so divisible by 2. Its digits add to 9 so it is divisible by 9. Divisible by 2 and by 9 means divisible by 18.
18