Mathematics Crossword Puzzle

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Across
  1. 4. P50 GROUPED
  2. 6. P35 UNGROUPED
  3. 7. D7 UNGROUPED
  4. 9. POSITION OF Q3 GROUPED
Down
  1. 1. Q1 UNGROUPED
  2. 2. P68 GROUPED
  3. 3. P25 GROUPED
  4. 4. D5 GROUPED
  5. 5. (4/10)(N+1) UNGROUPED
  6. 8. (69/199)(N+1) UNGROUPED