How many three-digit numbers have the first digit
equal to the sum of the other two digits?
Answers
Answered by
3
Answer:
Ways : (9,0); (8,1);(7,2);(6,3);(5,4) .. Each of the above 5 ways can be taken as 2 different arrangements.. 981 or 918. So 5*2=10 2) x ...
Answered by
8
Step-by-step explanation:
Answer:
We have four digits.
The numbers we need to make have 3 digits.
There are 4 choices for the first digit, 4 choices for the second digit and 4 choices for the third digit since repetition is allowed.
Hence, the total number of 3 digit numbers that can be made is equal to:
4×4×4=4
3
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