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marissa, john, and stephanie are working a 3- hour shift together. Marissa has an alarm on her phone that goes off every 12 minutes. John's phone alarm goes off every 30 minutes, and stephanie's phone alarm goes off every 45 minutes. If all their alarms went off at the same time 15 minutes into their shift, will they simultaneously go off again before their shift is over?

Sagot :

craigc456
3 hours =180mins

marrisa 15,28,42,56,68,80,92,104,116,128,140,152,164,176,188,
john 15,45,75,105,145,175,205
stephanie 15,60,105,150,195

no there alarm didnt go at the same tiem after the first time 
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