/sci/ - Science & Math

Help an anon

1. Catherine is jumping along a row of tiles. Starting from the first, with jumps of 3 tiles at a time (ie, jump on the 4th, 7th, 10th, and so on), it arrives on the last one; turns back and, with jumps of 4 tiles at a time, returns to the first; turn again and, with jumps of 5 tiles, get back to the last tile; he turns back and, with 6 tile jumps back to the first one again. Which of the following could be the number of tiles in the row? (A) 391 (B) 271 (C) 301 (D) 270 (E) 360