Knowing our Numbers

1234567
Across
  1. 2. expressing a number that is one less than one thousand in words1
  2. 5. Value of Indian System equivalent to 1 million
  3. 6. greatest 5 digit number using 9, 8, 7
  4. 7. 1 less than greatest 7 digit number
Down
  1. 1. Place of International system of numeration after Ones and tens
  2. 3. 2, 4, 6, _
  3. 4. successor of 10378695