NUMBERS

12345678
Across
  1. 1. Guess me. I am the successor of 4178
  2. 5. To find me you need to find out the greatest 5 digit number
  3. 6. Guess the predecessor of 3999
  4. 7. I am the double of 50. Guess me who am I ?
  5. 8. Find me. I am the product of greatest 3 digit number and the smallest 2 digit number
Down
  1. 2. I am the sum of greatest 2 digit number and the smallest 3 digit number
  2. 3. I am the greatest 4 digit number
  3. 4. I am the figured form of one thousand two hundred thirty three
  4. 5. I am the largest number obtained from these digits 7 , 8 , 9 , 0
  5. 7. Guess the product of 125 and 8 to get me