Lucas Ribeiro's work

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Across
  1. 1. I'm the triple of ten
  2. 3. I'm the third number in the place value. What's my name?
  3. 7. I'm a prime number or not. Scientists discuss me for years
  4. 8. I'm the sum of two and five
Down
  1. 1. two If you subtract me by twenty and multiply by five you get ten. Who am I?
  2. 2. I'm a factor of six but above two
  3. 4. If you subtract sixteen by eight you get me. Who am I?
  4. 5. I'm a prime number below eight and above three
  5. 6. I'm half the quotient of eight and thirty-two