MATHEMATICS

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12345
Across
  1. 2. 11th term?
  2. 3. means between 45 and -39.
  3. 5. 2 geometric means between 36 and 54.
Down
  1. 1. is the 12th term of the sequence?
  2. 4. 9th term if the 2nd term is 36 and the 6th is 48.