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In place value, a period is each group of three digits separated by commas in a multidigit number.
28
The number is 782. The sum of its digits is 7 + 8 + 2 = 17, not 26. Therefore, no such number exists that meets all the given conditions.
Add the digits together. The sum of the digits of 23 is 5.
It has five digits each of them representing numerical quantities
In place value, a period is each group of three digits separated by commas in a multidigit number.
28
1
The number is 782. The sum of its digits is 7 + 8 + 2 = 17, not 26. Therefore, no such number exists that meets all the given conditions.
Add the digits together. The sum of the digits of 23 is 5.
It has five digits each of them representing numerical quantities
The number of strings of four decimal digits that have exactly three digits which are nine is the number of ways to choose three places to choose the nines multiplied by the number of possibilities for the other digits (because you can put all of the possibilities in an array so that each column has a different way of arranging the nines and that each row has a different set of other digits (because they do not affect each other)). The number of ways to choose the three places to choose the nines is the same as the number of ways of choosing 4-3=1 spot for there not to be a nine. The number of ways of choosing 1 spot where there are 4 spots is 4 (the first, the second, the third, or the fourth). Since there are 9 digits that are not nine, the number of choices for the other digits is 9 (since there is only one digit). Thus, there are 4*9=36 strings of four decimal digits that have exactly three digits which are nine.
None.
by moving each digits
By the sum of its digits: 10. By each of its individual digits: 11.
Add the digits together. The sum of the digits of 23 is 5.
838