Problems on H.C.F and L.C.M
What is the least number of that is exactly divisible by 4, 12, 15, and 18?

150
60
110
180

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Problems on H.C.F and L.C.M
An electronic device makes a beep after every 60 sec. Another device makes a beep after every 62 sec. They beeped together at 10 a.m. The time when they will next make a beep together at the earliest,

9 : 31 am
12 : 31 am
10 : 31 am
11 : 31 am

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Problems on H.C.F and L.C.M
Three friends Raju , Ramesh and Sunil start running around a circular stadium and complete a single round in 24 s, 36 s and 40 s, respectively. After how many minutes will they meet against at the sta

5 minutes
7 minutes
8 minutes
6 minutes

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Problems on H.C.F and L.C.M
Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is:

95
90
85
80

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