subject characteristics

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Across
  1. 2. The opposite of noisy.
  2. 4. It’s hard to understand.
  3. 6. It’s nice, calm.
Down
  1. 1. It’s not interesting.
  2. 2. People talking loudly.
  3. 3. You have too many things to do.
  4. 5. It’s a simple maths problem.