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1981 AMC 12 Question 22

AMC12 · 1981 AMC 12

Question 22

How many lines in a three-dimensional rectangular coordinate system pass through four distinct points of the form $(i,j,k),$ where $i,$ $j,$ and $k$ are positive integers not exceeding four?
  1. $60$
  2. $64$
  3. $72$
  4. $76$
  5. $100$