Maths

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Across
  1. 3. numbers that make a triangle are?
  2. 5. what is the total _____ of this shape?
  3. 6. all numbers that cannot divided evenly are?
  4. 8. all _______ are composite?
  5. 9. the opposite of prime numbers are?
Down
  1. 1. the opposite to triangular numbers are?
  2. 2. all numbers have?
  3. 3. a clock tells the?
  4. 4. a number that has two factors is a?
  5. 7. a number after one is a?