they are numbers
123456
Only one. 123456.
None. Extremely simple proof: To be divisible by 5 the units digit must be 5. But then it would not be divisible by 2.
123456 x 17=2'098'752
they are numbers
1,3,7.9,21
Most winning numbers of Colorado
Just one. unless you count 123456 different from 132456 then there are 46656 * * * * * But you cannot count 123456 as different from 132456 since it is NOT a different combination. And the question was about combinations.
To multiply two numbers by one number to get a product with 123456 in it, you would need to find a combination of numbers that would result in this specific product. One possible way to achieve this is by multiplying 144 by 857 to get 123408, and then multiplying this result by 2 to get 246816. This way, you are multiplying two numbers by one number to get a product with 123456 in it.
You don't generally add punctuation to numbers.
123456
123456..........odd numbers are facing you with hood open.
15241383936
Only one. 123456.
123456 - 7890 = 115,566
None. Extremely simple proof: To be divisible by 5 the units digit must be 5. But then it would not be divisible by 2.