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Maths Puzzle
Q. A watch loses 5 minutes every hour and was set right at 8 AM on a Monday. When will it show the correct time again?
Option
a) 9 AM on Sunday
b) 8 AM on Sunday
c) 9 AM on Saturday
d) 8 AM on Saturday
Read Solution (Total 6)
-
- clock will show the same time after 24 hours
since loss of 5 min in 1 hour
so loss of 60min(1 hr) in 12 hour
so loss of 24 hr in 12*24 hour=12 days
after loss of 24 hr it will again at 8 AM after 12 days
i.e at 8 AM on sunday
ans(b)
- 10 years agoHelpfull: Yes(2) No(3)
- Every day at 8 AM,watch shows the time follows:
Monday | Tue | wed | Thur | Fri | Satur | sun ||
-------------------------------------------------------------------
8 AM(right) | 6 AM | 4 AM | 2 AM | 12 PM | 10 PM | 8 PM ||
In watch 8 AM = 8 PM ....I Think given options contain flaw. - 10 years agoHelpfull: Yes(0) No(1)
- For the watch to show the correct time again, it should lose 12 hours.
It loses 5 minutes in 1 hour
=> It loses 1 minute in 12 minutes
=> It will lose 12 hours (or 720 minutes) in 720*12 minutes = 144 hours = 6 days
=> It will show the correct time again at 8 AM on Sunday - 10 years agoHelpfull: Yes(0) No(2)
- @RAKESH, AFTER 12 DAYS IT IS SATURDAY
MONDAY+7DAY=MONDAY
8=T,9=W,10=TH,11=FRI,12=SATURDAY - 10 years agoHelpfull: Yes(0) No(0)
- 8am sunday
- 5 years agoHelpfull: Yes(0) No(0)
- b may be not sure
- 4 years agoHelpfull: Yes(0) No(0)
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