Fun With Mathematics

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Across
  1. 3. The famous Rubik's _____.
  2. 5. Longest chord of Circle.
  3. 8. A part of a whole.
  4. 9. 2D figure with 6 sides.
  5. 10. Triangle with all sides equal.
  6. 13. A number having exactly 2 factors.
  7. 15. Proportion, Relative.
Down
  1. 1. Smallest 3 - digit number.
  2. 2. Math of Unknowns.
  3. 4. Periphery, Length of a Closed 2D figure.
  4. 6. Measurement.
  5. 7. 1000 Metres = 1 _______.
  6. 11. Natural + Negative Numbers.
  7. 12. Measured in Degrees.
  8. 14. Shape of a B'Day Cap.