60.
There are 5 different choices for the first digit, four for the second digit, and three choices for the third digit. According to the fundamental counting principle, you multiply them together to get the total number of possible ways, and 5 x 4 x 3 = 60
Another way to think about it is 5!/3!
If the numbers are allowed to repeat, then there are six to the fourth power possible combinations, or 1296. If they are not allowed to repeat then there are only 360 combinations.
If you can repeat a digit, there are 27. If you can't repeat a digit, there are only 6.
imm they would b the same wouldn't they, except number 1 may repeat itself (number 1 and 100-001).
Yes. Rational numbers repeat the SAME pattern over and over again; for example 0.343434... or 0.80122122122122... In the latter case, the period starts after some other digits; it is still rational.
Some are, some aren't.If the portion after the decimal point:terminates (eg 0.125);does not terminate, but repeats one or more digits (eg 0.333..., 0.181818...)does not terminate, but has one or more digits followed by one or more further digits that repeat (eg 0.16666..., 0.258373737...)then the decimal is rational.otherwise, if the decimal does not terminate and does not repeat any digits (eg π = 3.1415726..., √2 = 1.41421...)then the decimal is irrational (not rational).
5
-- If you're allowed to repeat digits, then you can make (4 x 4 x 4 x 4) = 256 of them.-- If you're not allowed to repeat digits, then you can make (4 x 3 x 2 x 1) = 24 of them.
If you are not allowed to repeat the digits then the answer is clearly 0.If you are allowed to repeat digits then the only way you can possibly reach a product of 4 is by using a combination of 3 "1's" and 2 "2's". The possible combinations are therefore:22111212112112121112122111212112112112211121211122Thus there are 10 numbers which meet the criteria.
If you're allowed to repeat the digits, then (5 x 5 x 5) = 125 can.If you're not allowed to repeat the digits, then (5 x 4 x 3) = 60 can.
If the numbers are allowed to repeat, then there are six to the fourth power possible combinations, or 1296. If they are not allowed to repeat then there are only 360 combinations.
None. Nine digit number cannot be formed using only five digits 1,2,3,4,5 in the case none of the digits can repeat. -------- Egad! I misread the question, apologies to the questioner. And thanks to Miroslav.
3.14 has a finite number of digits. All numbers with a finite number of digits are rational. Pi has an infinite number of digits, AND the digits don't repeat in a regular pattern. (Numbers with repeating decimals are rational as well.)
Irrational numbers.
-- If you're allowed to repeat digits in one combination,then there are 104 = 10,000 possibilities.-- If all four of the digits must be different, then there are(10 x 9 x 8 x 7) = 5,040 possibilities.
192, including ones containing repeat digits.
Are you allowed to use a digit more than once? I will assume not: There are 8 choices for the first digit. One digit has been used, so there are only 7 choices for the 2nd digit. ... 6 for the 3rd, etc. The total number of numbers is 8x7x6x5x4 = 56x30x4 = 56x120 = 6720. If you are allowed to repeat digits, then the answer is 85 = 32,768.
13,579 or .13579 . If I'm allowed to repeat digits, then you are 11,111 or .11111 .