Write down the biggest digit of a number in base 5.

For base n, all the digits from 0 to n-1 are allowed.

Think about base 10. 9 is the biggest digit.
so, for base 5, 4 is the biggest digit.

Each digit is the remainder when dividing by 5, so must be less than 5.

To find the biggest digit of a number in base 5, you would need to convert the number to base 10 and then identify the largest digit.

Let's say we have the number 12345 in base 5.

To convert it to base 10, we multiply each digit by the corresponding power of 5 and sum them up:

1 * 5^4 + 2 * 5^3 + 3 * 5^2 + 4 * 5^1 + 5 * 5^0
= 625 + 250 + 75 + 20 + 5
= 975

So, in base 10, the number 12345 in base 5 is equal to 975.

To find the biggest digit in base 5, we look at the largest digit in base 10, which is 9.

Therefore, the biggest digit of the number 12345 in base 5 is 9.

To find the biggest digit of a number in base 5, you first need to understand how base 5 works. In base 5, there are only five possible digits: 0, 1, 2, 3, and 4.

To find the biggest digit of a number written in base 5, you need to look for the highest value digit in the number. In other words, you need to find the largest digit among 0, 1, 2, 3, and 4.

For example, let's say we have the number 1432 in base 5. To find the biggest digit, we compare each digit of the number:

- The first digit is 1.
- The second digit is 4.
- The third digit is 3.
- The fourth digit is 2.

From this comparison, we can see that the digit 4 is the largest digit in the number 1432 in base 5.

So, the biggest digit of a number in base 5 is 4.