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Each digit can appear in each of the 4 positions.

There are 9 digits, therefore there are 9⁴ = 6561 such combinations.

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6y ago
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Jack Kolars

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2y ago
Can you list the 6561 combinations?

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Q: If using numbers 1 through 9 how many different 4 digit combinations can be made with no restrictions on order or repeats?
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Related questions

If using numbers 0 through 9 how many different 4 digit combinations can be made with no restrictions on order or repeats?

In other words, how many 4 digit combination locks are there using the digits 0-9 on each wheel. There are 10×10×10×10 = 10⁴ = 10,000 such combinations.


How many different ways can I place 4 numbers?

Without repeats, 24. With repeats, 256.


How many combinations can be made from 1234567890?

If repeats are allowed than an infinite number of combinations is possible.


How many 3 digit combinations can be formed using 0 5 7 8?

Assuming you are using combinations in the colloquial way (which is the mathematical "permutations" where order of selection does matter) to create a 3 digit number that does not start with 0, ie creating a number that is between 100 and 999 inclusive then: If repeats are not allowed there are 3 × 3 × 2 = 18 possible numbers If repeats are allowed, then there are 3 × 4 × 4 = 48 possible numbers. If you are using combinations in the mathematical sense where order of selection does not matter and are creating groups of 3 digits, then: If repeats are not allowed there are 4 possible groups If repeats are allowed there are 20 possible groups.


How is a rational number that repeats different from a irratrional number that repeats?

Irrational numbers can not be repeating decimals. Any number that is a repeating decimal is rational.


How do you generate a list of five digit combinations of only the numbers 1 2 3 4 and 5 with out repeats?

you could make a probability tree if you could be bothered


How many 6 number combinations can you make with numbers 1-50. No 1 number repeats?

The number of combinations is 50C6 = 50*49*48*47*46*45/(6*5*4*3*2*1) = 15,890,700


How many different 2 digit numbers can be formed from the digits 2 6 7 and 8?

Without repeats there are 4 × 3 = 12 possible 2 digit numbers. With repeats there are 4 × 4 = 16 possible 2 digit numbers.


How many 8 number combinations are their using numbers 0 -9?

there are 10 numbers that you can choose from 0-9 you are choosing 8 at a time, meaning no repeats so the answer is "10 choose 8" or 10!/(8!*(8-2)!)


How many 6 number combinations can made from 50 numbers 1-50?

We are not told anything about repeats so I will assume you can repeat a digit. For example, you can have 111111 The first digits has 50 choices so does the second and the third..etc so we have 50^6 combinations.


How many 3 digit even numbers can be formed by using numbers 01234?

Assuming leading zeros are not permitted, then: If repeats are not allowed there are 30 possible numbers. If repeats are allowed there are 60 possible numbers.


How many odd 3- digit positive integers can be written using the digits 1 2 4 7 and 8?

If repeats are permitted: 2 x 5 x 5 = 50 different odd numbers If repeats are not permitted: 2 x 4 x 3 = 24 different odd numbers