how many number we can make using nos, 1,2,3,4,5?

Answer 1

infinite maybe!

Answer 2

That depends if you mean to use only one of each (i.e. you can only use the number 1 once with in the series, the number 2 only once, etc.). If this is the case then the equation would be 5^5 (5 in the power of 5) since you have 5 variables (1,2,3,4,5) and each one of the can be placed in five different places with in the series. If your just asking how many numbers can be created regardless to the number of times you use each of the 12345 numbers then that would be infinity.

Answer 3

Five of them : 1, 2, 3, 4, and 5.

If you mean "how many number we can make using" the digits 1,2,3,4,5 ...
Well, that depends if you count repetitions.

Without repetitions: 325.
With repetitions, it's infinite.

If you're wondering about the math:
1-digit or 2-digit or 3-digit or 4-digit or 5-digit numbers
C(5,1)*1! + C(5,2)*2! + C(5,3)*3! + C(5,4)*4! + C(5,5)*5!
== 5 + 10*2 + 10*6 + 5*24 + 1*120
== 5 + 20 + 60 + 120 + 120
== 325

Answer 4

120, or 1*2*3*4*5.

Think of it this way:
One number, one possibility.
Add a second number, there are 2 places to put it: before or after the first. (1*2)=2
There are three places to add a third number (front, middle, or back), so 2*3=6.
There are 4 places to add a fourth number...4*6=24
There are 5 places to add a fifth number...5*24=120
etc...

Answer 5

Using each number only once?
If we can re-use the same number, we can keep going
"To infinity and beyond!!!!"

Answer 6

real nos
5x5=25

Answer 7

are we talking whole numbers? you should define your question.

Answer 8

54,321