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iPhone / iPad
  • Travel
  • Games
  • Educational
  • Puzzle
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This app contains 100 puzzles. It asks the operator to determine which river is longer.
The app lists 2 options in each puzzle. In total the app investigates 200 rivers.
The app lists the correct information about the two rivers after the operator chooses his/her answer.

Music is played in the background to add enjoyment.