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How many strings of three decimal digits do not contain the same digit three times?
Wiki User
∙ 12y ago
Probably 990, depending on the rules.
Fun question, but there is more than one answer depending on the rules. If the first digit can be zero, and if you can accept 001, 002, etcetera as answers, then you have 10 choices for the first digit, 10 choices for the second digit, and 10 choices for the third digit. But, you have to subtract the ten occurrences when all three digits match (000, 111, 222, 333, etc.) 10 x 10 x 10 - 10 = 990.
Wiki User
∙ 12y ago
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How many strings of four decimal digit have exactly three digit that are nine?
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.
Find the all distinct four-digit numbers that contain only the digits 12345?
There are 625 of them - too many to list.
How many times greater is the place value of a digit of a number than the place value of the next digits to the right?
In the decimal place value system, each digit is ten times bigger than the digit on its right
How many even four digit numbers can be made using 02356 where the first digit is cannot be 0 and no digits are repeated?
Assuming that 2356 is a different number to 2365, then: 1st digit can be one of four digits (2356) For each of these 4 first digits, there are 3 of those digits, plus the zero, meaning 4 possible digits for the 2nd digit For each of those first two digits, there is a choice of 3 digits for the 3rd digit For each of those first 3 digits, there is a choice of 2 digits for the 4tj digit. Thus there are 4 x 4 x 3 x 2 = 96 different possible 4 digit numbers that do not stat with 0 FM the digits 02356.
How many 3 digit numbers can be formed by 3 4 5 6 7 8 without repetition?
120. There are 6 digits. If we pick the digits in order, there are 6 possible digits for the first digit 5 remaining digits for the second digit 4 remaining digits for the third digit. 6*5*4 = 120.
How many strings of four decimal digits end with an even digit?
There are 5000 such strings.
How many strings of four decimal digits contain each digit at most twice?
9630 of them. 10 have all four digits the same and 360 have 3 of one and 1 of another.
How many strings of six decimal digits end with an even digit?
There are 500000 such numbers.
What rule must be used to find the number of strings of four decimal digits that do not contain the same digit twice?
It is the number of combinations of four numbers where the number of available digits starts at 10 and reduces by 1 each time.
How many strings of four decimal digits do not contain the same digit twice?
If the lead digit cannot be zero then there are 9 x 9 x 8 x 7 = 4536 combinations. If the lead digit can be zero then there are, 10 x 9 x 8 x 7 = 5040 combination.
A decimal number in which a digit or group of digits repeats without end?
a decimal in which a digit or group of digits repeats without end
Where is the first 0 in the digits of pi found?
The first occurrence of the digit 0 in the digits of pi is at the 32nd decimal place.
How many strings of three decimal digits begin with an odd digit?
There are 500 of 3-digit numbers begin with an odd one (100-199, 300-301, 500-599,700-799, and 900-999). In terms of "how many strings of", may filter or expand the above answer.
What is standard form of decimals?
The standard form is a string of digits such that the place value of each digit is ten times that of the digit to its right. It may or may not contain a decimal point.
What is a decimal in which a digit or a group of digits repeats without end?
It is a repeating decimal.
Is a decimal number with two digits is sometimes equal to a decimal number with three digits?
Only if the final digit, after the decimal point, is zero.
What is the digits or digit that repeats in a repeating decimal?
It can be any digit. 1/9 = 0.1111... 2/9 = 0.2222... etc 1.0 = 0.99999.... (odd though that might seem, it is mathematically true.) Or it can be different strings of digits: Division by 7 gives 142857 Division by 13 gives 307692
