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# How Many 4 Digit Numbers Can Be Made Using 1-7?

## Math Trick to Figure Out the Answer

Are you wondering how many 4 digit numbers can be made using the digits 1-7? The answer is fairly easy to figure out. All you need to do is use a little math trick.

### Step 1: Count the Digits

The first step is to count the total number of digits you have available to use. In this case, you have 7 digits to work with (1-7).

### Step 2: Calculate the Total Possible Combinations

Now that you know how many digits you have to work with, you can easily calculate the total possible combinations. All you need to do is multiply the total number of digits (7) by itself three times. This will give you the total number of possible combinations you can make with the given digits (7x7x7).

### Step 3: Calculate the Final Answer

Now that you know the total number of possible combinations, all you need to do is subtract 1 from the total to get your final answer. In this case, the total number of possible combinations is 343, so the final answer is 342.

## Summary

So there you have it – the answer to your question! If you want to know how many 4 digit numbers can be made using 1-7, the answer is 342. All you need to do is use a little math trick to figure out the answer.