You must place 7 robot ants on a long rod and set each of them to move left or right starting at time 0. You can set any positive speed for each ant. When 2 or more ants meet, they turn around. When an ant reaches the end it falls off. Show that you can place and set the ants in such a way that n...

Make a mathematical expression whose value is equal to 2 that uses all the digits 0, 1, 2, ... 9 exactly once and uses as few other mathematical symbols as possible.

Cathy: [4:39 am, bites nails and breathes heavily as she races to her brother's house while calling him] Come on, answer Bill, wake up, please! [No answer, but she whips into his driveway and barely gets it in park before she's banging on the door.] Bill, wake up! Bill! John's in trouble. It's me...

7 = 31674ZS 8 = 883011SO 9 = 166037352UR 10 = 434782608WP 11 = 31701296735IG What would 12 be equal to in this same pattern?