number system

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123456
Across
  1. 2. number from 4,6,8, 9
  2. 3. 3 digit number
  3. 5. 5 digit number
  4. 6. of 356
Down
  1. 1. of 45
  2. 4. numerals form digits 6,5,7
  3. 5. of smallest 5 digit number