Fixed

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Across
  1. 3. lasting for the whole of a person's life
  2. 5. a long, research-based work, perhaps 10-15,000 words, for a degree or diploma
  3. 6. ability to do basic mathematics
  4. 7. tricks that help you remember something.
Down
  1. 1. the process of accepting people into a university, school, etc. as students, or the part of a university, school, etc, that deals with it.
  2. 2. study in a very concentrated way for a short time.
  3. 3. the ability to read and write
  4. 4. a person who has a great and rare natural ability or skill, especially in a particular area such as science or art.