4! = 24 ■
With 123 digits you can make 123 one-digit numbers.
Ten different digits can be used to make 10C4 = 10*9*8*7/(4*3*2*1) = 210 four-digit numbers. Either numbers starting with 0 are permitted or the 10 digits do not contain a 0.
how make the answer im don/now
3*3*2*1 = 18 of them.
9876 is the largest four digit number you can make if all the digits must be different.
With 123 digits you can make 123 one-digit numbers.
Ten different digits can be used to make 10C4 = 10*9*8*7/(4*3*2*1) = 210 four-digit numbers. Either numbers starting with 0 are permitted or the 10 digits do not contain a 0.
how make the answer im don/now
3*3*2*1 = 18 of them.
9876 is the largest four digit number you can make if all the digits must be different.
Twelve of them.
4 x 3 x 2 ie 24
9
61 is prime. You cannot make 61 by multiplying four digits.
6 if all digits are different, 27 otherwise.
how make the answer im don/now
Oh, dude, I mean, like, there are 4 digits in 1230, right? So you can totally make 4-digit numbers by using each of those digits once. That's like, 4 factorial, which is 24. So, you can totally write 24 different four-digit numbers using 1230 without repeating any digit. Easy peasy!