Wipro Company Numerical Ability Clocks and Calendars

Clocks A, B and C strike every hour. B slows down now and takes 2 minutes longer than A per hour while C has become faster and takes 2 minutes less that A per hour. If they strike together at 12 midnight when will they strike again?

a. 10 a.m
b. 11 a.m
c. 10 a.m
d. 11 p.m

Read Solution (Total 2)

Clock A strikes every 60 minutes.

Clock B strikes every 62 minutes.
Clock C strikes every 59 minutes.

The LCM of 60, 62, and 59 is: .109,740 minutes

i.e,76 days 5 hours

so,they strike at 5 am.on 77th day
8 years agoHelpfull: Yes(0) No(1)

C takes 58 mins, B takes 62 mins ando A takes 60 mins for 1 hr. Hence Lcm of 58,60,62 is 53940 mins. That equals to 37 days and 11 hrs. Hence answer is b 11 am.
8 years agoHelpfull: Yes(0) No(0)

Wipro Other Question

Amar takes either a bus or a local train to work. The probability of taking a bus is 0.3 and that of taking the local train is 0.7. When he takes the bus, he is late 30% of the working days and when he takes the train it is 20% of the days. On the particular Monday, he was late for work. What is the probability that he took the bus that day?

a. 0.3
b. 9/23
c. 16/23
d. 0.7 In how many ways can 2, 3, 7 and 6 be arranged in a 4-digit number that is divisible by 3 using each digit only once?

a. 8
b. 12
c. 24
d. 256