Playing with numbers

12345678
Across
  1. 4. This is the HCF of 18 and 32.
  2. 5. The rule to check whether the given number is perfectly dividing any number or not.
  3. 6. It is a number that is obtained by multiplying the given number with any natural number.
  4. 8. The _____ of a number divides the number exactly.
Down
  1. 1. These are the numbers having more than 2 factors.
  2. 2. HCF ? LCM = 4 ? 48 = 192, which operation will replace '?'
  3. 3. The order of performing operations.
  4. 7. The numbers ends with 0,2,4,6,8