bi, tri, uni, others

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Across
  1. 2. A group of three related things
  2. 5. The entire population under study
  3. 6. The 10th mouth of the year
Down
  1. 1. To ride aa uni cycle
  2. 3. A two wheeled vehicle driven by pedals
  3. 4. A polygon having five anglesand five sides
  4. 5. A mythical creature resembeling a horse with a single horn in the center of its forehead