Mathematics

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Across
  1. 1. The fourth multiple of 5 is _______.
  2. 3. Numbers that have more than two factors are called _______ numbers.
  3. 5. Pairs of numbers that have only 1 as their common factor are called ______ numbers.
  4. 7. Numbers with exactly two factors, 1 and the number itself are called ______ numbers.
  5. 8. A number is divisible by 8 if the number formed by the last _____ digits is divisible by 8.
  6. 9. ________ rules are applied to a number to check whether the given number is divisible by a particular number or not.
Down
  1. 2. _____ is the only even prime number.
  2. 4. Two prime numbers whose difference is 2 are called _________ numbers.
  3. 6. The smallest prime number between 8 and 20 is _______.
  4. 8. The second common multiple of 3 and 5 is _______.