How many 4 digit numbers can be made using the numbers 1,3,5,7 only? And what is the biggest and smallest number that can be made using these 4 digits only?
Answers
Answered by
0
Answer:
We can form (if you join me) 24 numbers using the digits 1,3,5,7 *if we don't repeat any number. The largest and smallest number we can form by 1,3,5,7 is 7531 and 1357 respectively.
Step-by-step explanation:
If we are asked to find the number of numbers we can form by a given number of digits, we just have to take the factorial of the number of digits, like there are four digits in total (i.e. 1,3,5 and 7). So we must do 4! = 24 (4! = 1×2×3×4).
If you wanna have all the values of numbers then here it goes :-
1) 1357
2) 1375
3) 1537
4) 1573
5) 1735
6) 1753
7) 3157
8) 3175
9) 3571
10) 3751
11) 3715
12) 3517
13) 5713
14) 5731
15) 5317
16) 5371
17) 5137
18) 5173
19) 7135
20) 7153
21) 7513
22) 7531
23) 7315
24) 7351
Similar questions