question: Doxa sliced an apple into 8 pieces. She ate 1 slice, her sister ate 1 more than her, and her brother ate 1 more than her sister. How many slices of apple did they all eat?
answer: Her sister ate 1 + 1 = <<1+1=2>>2 slices.
  Her brother ate 2 + 1 = <<2+1=3>>3 slices.
  They ate a total of 1 + 2 + 3 = <<1+2+3=6>>6 slices.
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