A cross number

12345678910111213
Across
  1. 2. Eighteen thousand seven hundred and twenty three
  2. 3. 123 to two sigificant figures
  3. 5. minutes between 11.00 and 12.35
  4. 6. 24 x 36
  5. 9. number of seconds in an hour
  6. 10. number of metres in 5km
  7. 11. nine million in digits
  8. 13. number of grams in 7.5 kg
Down
  1. 1. 981 divided by three
  2. 2. number of sides in a decagon
  3. 3. height in cm of a boy who is 1.25m
  4. 4. 615 divided by 5
  5. 5. 97934 to two significant figures
  6. 7. Four thousand and eight
  7. 8. 71232 to one significant figure
  8. 10. Fifty six thousand and forty seven
  9. 12. twenty squared