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Maths Puzzle
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Four different electronic divices make a beep after every 30 min., 1 hr, 1½ hr. and 1hr 45min. respectively All the diveices beeped together at 12 noon. They will again beep together at
Read Solution (Total 2)
-
- Time-gap after, the devices will beep together = (LCM of 30, 60, 90, 105) minutes.
= 1260 minutes.
= 21 hours.
the devices will again beep after 21 hrs.
at 9 a.m. the devices will again beep. - 11 years agoHelpfull: Yes(4) No(0)
- lcm of 30,60,90,105 is =1260 means 21 hours
so 9AM - 11 years agoHelpfull: Yes(1) No(0)
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