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There are 30,240 different 5-digit numbers.
Math: 10*9*8*7*6
1st digit has 10 possible choices (0-9)
2nd digit has 9 possible choices (one of the digits was used in the 1st digit)
3rd digit has 8 possible choices
4th digit has 7 possible choices
5th digit has 6 possible choices
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How many 5 digits numbers are there whose digits sum to 22?
There are 5460 five digit numbers with a digit sum of 22.
How many 6 digit numbers can be formed using the digits 123456789?
There are 60480 numbers.
How many even two digit numbers are there where the sum of the digits is 5?
To find the even two-digit numbers where the sum of the digits is 5, we need to consider the possible combinations of digits. The digits that sum up to 5 are (1,4) and (2,3). For the numbers to be even, the units digit must be 4, so the possible numbers are 14 and 34. Therefore, there are 2 even two-digit numbers where the sum of the digits is 5.
How many six digit numbers are there in which no digit is repeated even digits appeared in the even places and odd digits in the odd places and the number is divisible by 4?
There are 5760 such numbers.
How many 7 digit numbers have digits in increasing order?
36 of them.
