Use the digits 4,5,6,7 and 8 only once.Write the greatest number possible with 8 in the ten thousands place

87,654

87,654

Write the digit in the ten thousands place

To find the greatest number possible with 8 in the ten thousands place using the digits 4, 5, 6, 7, and 8 only once, we need to consider the remaining digits for the other places.

Let's start by placing the digit 8 in the ten thousands place:

__ __ __ __ 8

To find the largest number, we should place the highest remaining digits in the subsequent places. Since we want the greatest possible number, we should place the highest digit, which is 7, in the thousands place:

__ __ __ 7 8

Next, we place the next highest remaining digit, which is 6, in the hundreds place:

__ __ 6 7 8

Continuing, we place the digit 5 in the tens place:

__ 5 6 7 8

Lastly, we place the remaining digit 4 in the ones place:

4 5 6 7 8

Therefore, the greatest number possible with 8 in the ten thousands place using the digits 4, 5, 6, 7, and 8 only once is 45678.