hard · GMAT Quant
Three automated robotic arms in a fulfillment center operate on fixed cycle times of 3 minutes, 5 minutes, and 6 minutes. Arm 1 is active during the 1st minute of its 3-minute cycle, Arm 2 is active during the 1st minute of its 5-minute cycle, and Arm 3 is active during the 1st minute of its 6-minute cycle. During a 180-minute shift starting at minute 1, during
How many minutes are exactly two robotic arms active simultaneously?
- 42
- 36
- 30
- 31
- 24
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