Question

What is the largest number you can make using each of the digits 7, 1, 0, 2, and 9 just once?

Answer 1

`97210`

Explanation:

`"listing the digits from largest to smallest gives the largest"`
`"number that you can make"`

`rArr97210larrcolor(red)" is the largest number"`

Answer 2

`97,210`

Explanation:

As you move to the left. the value of the place holders increases.

Therefore the largest number you can write will have the largest digits on the left and the smallest digits on the right.

`5` digits means the first place holder will be ten thousands.

`90,000` is a much bigger number than `20,000` for example.

So, arrange the digits in descending order to get: `97,210`

(Conversely the smallest number would be `01,279` if `0` at the front is permitted, else `10,279`)