Number meanings

12345678910
Across
  1. 5. is a bike with two tires
  2. 6. is a group of seven
  3. 8. is a animal that walks with six feet
  4. 9. is a bike with one tire
  5. 10. is a shape with eight sides
Down
  1. 1. is a bike with four tires
  2. 2. is a bike with three tires
  3. 3. is a period of 10 years
  4. 4. is a marathon with 5 sports
  5. 7. is a shape with nine sides