0
The first digit can be any one of them ... 1, 2, 3, 4, 5 ... five choices. For each one . . .
The second digit can be any one of them ... five choices. For each one . . .
The third digit can be any one of them ... five choices. For each one . . .
The fourth digit can be either 2 or 4 ... two choices.
Total number of 4-digit possibilities: (5 x 5 x 5 x 2) = 250
Still curious? Ask our experts.
Chat with our AI personalities
Steve
Rafa
ProfessorAdd your answer:
Earn +20 pts
How many even numbers are in the number 273?
None. There is 1 even digit but that is not the same thing.
How many even 2-digit whole numbers less than 50 are there using the digits 1-9?
To determine the number of even 2-digit whole numbers less than 50 using the digits 1-9, we need to consider the possible combinations. The even digits are 2, 4, 6, and 8. For the tens place, we can choose any digit from 1-4 (since we want numbers less than 50). For the units place, we can choose any of the even digits. Therefore, there are 4 choices for the tens place and 4 choices for the units place, resulting in a total of 4 x 4 = 16 even 2-digit whole numbers less than 50 using the digits 1-9.
How many 9 digit numbers using 1-9 once are prime?
None.
How many 3 digit whole numbers can you write using the digits 1 3 5 and 7 if no digit can be used twice?
24.
How many four digit numbers can you write using the digits 1 2 3 0 without repeating?
The answer is 3*3*2*1 = 18. If the leading digit is 0 it is not a 4-digit number.
