How many different three-digit numbers can you form using the digits 1, 2, 3, 4, 5, 6, and 7 without repetition?

Question

anonymous · Answer

This is a rather longs way of figuring it out.
Let's start off with 1__
123
124
125
126
127

132
134
135
136
137

142
143
145
146
147

152
153
154
156
157

162
163
164
165
167

172
173
174
175
176

30 combinations^
SO there should be 30 combinations for each of the 7 numbers.

30 * 7 = 210 combinations.

anonymous · Answer

*long

anonymous · Answer

Thank you very much!!! Long sometimes explains it better! Appreciated!

anonymous · Answer

Your welcome! Glad I could help. (: