Question

Arrange the following numbers in descending order.

$51806,81506,80615,56810$

Answer 1

Step I: Compare the first digit of each number:

The given numbers are $51806,81506,80615,56810$

To compare numbers with the same number of digits, start comparing from the left-most digit.

Here, the left-most digit in $51806,81506,80615,56810$ is $5,8,8,5$ respectively.

So, first, we will compare the thousands place digits of the numbers whose left-most digit is $8$ and then we will compare the thousands place digits of the numbers whose left-most digit is $5$.

Step II: Compare the thousands place digit.

Comparing $81506,80615$

The thousands place digit in $81506,80615$ is $1,0$ respectively.

Hence, $81506>80615$.

Comparing $51806,56810$

The thousands place digit in $51806,56810$ is $1,6$ respectively.

Hence, $56810>51806$.

Thus, $81506>80615>56810>51806$

Therefore, the descending order is $81506,80615,56810,51806$.