Mathscrossword-holiday

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Across
  1. 2. If 1 is added to the greatest 7-digit number, it will be equal to
  2. 4. Writing of numbers from the greatest to the smallest is called an arrangement in this order.
  3. 5. addition of two numbers
  4. 6. Successor of 999
  5. 7. multiplicative identity of the whole number
  6. 8. Two numbers having only 1 as a common factor
  7. 10. multiplication of two numbers
  8. 11. The product of a non-zero whole number and its successor is always
Down
  1. 1. additive identity of the whole number
  2. 2. The numbers having more than two factors
  3. 3. Multiplication is distributive over this for whole numbers.
  4. 6. smallest odd prime number
  5. 7. smallest natural number
  6. 9. neither prime nor composite