#1**0 **

They are all 3-digit numbers, so I'm going to put three lines to represent the three digits in the number.

___ ___ ___

The first digit has **five** possible options: 5, 6, 7, 8, 9

The second digit has **two** possible options: 3, 4

The third digit uses the remaining number from the second space: either 3 or 4;;; **1 option**

**_5_ _2_ _1_**

We multiply these together to get 5 * 2 * 1 which is equal to **10 numbers**

*(if you want, you can list them out as well. they are 534 543 634 643 734 743 834 843 934 943)*

- h

Guest Dec 27, 2021