2(5)+1+3 =14
Placing a question mark at the end of a list of expressions or numbers does not make it a sensible question.
1•4 2•2 -1•-4 -2•-2 four when you only include whole numbers
256!
How many numbers can we make with 650271 without doing the number more than 1 time
To determine the number of prime numbers between 1 and 8888888888888888888888888888888888888888888888, we can use the Prime Number Theorem. This theorem states that the density of prime numbers around a large number n is approximately 1/ln(n). Therefore, the number of prime numbers between 1 and 8888888888888888888888888888888888888888888888 can be estimated by dividing ln(8888888888888888888888888888888888888888888888) by ln(2), which gives approximately 1.33 x 10^27 prime numbers.
With 123 digits you can make 123 one-digit numbers.
Using 1, 2, and 3, you can make 27 whole numbers.
You can have infinitely many mathematical expressions that equal 13. Or any other given number. For example, 13 + 0, 12 + 1, 11 + 2, etc., then 0 + 13, - 1 + 14, -2 + 15, etc. ... there you have infinitely many. You can make up lots of other types of expressions that give the same result.
24
There are infinitely many pairs of numbers. One such is 1 and 385.
Not sure what a "didget" is. It is possible to make 18 5-digit numbers.
In whole numbers, 2. 1 * 13 = 13