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Australian AMC 2021 - Upper Primary Question 23

AMC AUSTRALIA · Australian AMC 2021 - Upper Primary

Question 23

Three gears are connected as shown. The two larger gears have 20 teeth each and the smaller gear has 10 teeth. The middle gear is rotated half a turn in the direction of the arrows, turning the M upside down. What do the three gears look like after this rotation?

Question illustration

Question illustration
  1. Picture A
  2. Picture B
  3. Picture C
  4. Picture D
  5. Picture E