144
Yes. Natural numbers are counting numbers, equal to or greater than 0. The only ways a product can be less than its multiplicands is when multiplying fractions by fractions or multiplying a positive number by a negative number.
A number with more than 2 digits must be at least 100. Any two numbers of this kind will give an answer that is at least 10000. So there are no ways to make 144 with multiplication of numbers with more than 2 digits.
Find out yourself
Multiply:1x15=1515x1=153x5=155*3=15*With multiplying fractions, there are an infinite number of ways to get the product of 15, but the four listed above are used by multiplying whole numbers.
Only One
Yes. Natural numbers are counting numbers, equal to or greater than 0. The only ways a product can be less than its multiplicands is when multiplying fractions by fractions or multiplying a positive number by a negative number.
A number with more than 2 digits must be at least 100. Any two numbers of this kind will give an answer that is at least 10000. So there are no ways to make 144 with multiplication of numbers with more than 2 digits.
Find out yourself
I assume you mean "six numbers" rather than "sox numbers". If the numbers are all distinct (i.e none of them are in the set of thirty numbers more than once), then there are 30!/(24!6!) ways of choosing six numbers, where "!" is the factorial of that number.
48
If you want to add two numbers and get 775, there are 194 different ways to do it IF you onlyuse positive whole numbers ... a lot more than that if you're allowed to use negative numbersand fractions.If you want to add three numbers and get 775, there are even more ways to do it.
Multiply:1x15=1515x1=153x5=155*3=15*With multiplying fractions, there are an infinite number of ways to get the product of 15, but the four listed above are used by multiplying whole numbers.
What are all the sets of 3 numbers whose product is 50? (note: in probability this is combinations - there would be a lot more permutaions) Start by factoring 50: 50 = 5x10 = 5x5x2. The answer is that there is only one way. Can one (or two) of the numbers be 1? Then we have 3 more ways: 1x1x50, 1x2x25, 1x5x10; there are 4 ways altogether.
Bacteria grows rapidly and there a ways and one of the main ways to stop them from multiplying is to kill them with alcohol or chemicals
Only One
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If I'm allowed to use the same digit more than once, then there are (10 x 10 x 10) = 1,000 ways. If I'm not allowed to use the same digit more than once then there are (10 x 9 x 8) = 720 ways. Either way, I'm afraid you'll have to generate the list on your own.