hard · GMAT Quant
An automated optical inspection station runs three camera lasers, L_1, L_2, and L_3, on pulse periods of 5 seconds, 8 seconds, and 15 seconds, respectively. Laser L_1 pulses on second 1 of its 5-second cycle, L_2 pulses on second 1 of its 8-second cycle, and L_3 pulses on second 1 of its 15-second cycle. During a 360-second inspection window starting at second 1, during
How many seconds do exactly two camera lasers pulse simultaneously?
- 54
- 36
- 27
- 28
- 18
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