TCS Company Numerical Ability LCM and HCF

Four bells ring at an interval of 4, 8, 6, 10 minutes. If they toll together at 2:00 A.M, when will they toll together again?

Read Solution (Total 3)

l.c.m of 4,8,6,10 is 120 min i.e 2 hours

so ans is 2 am + 2=4 am
13 years agoHelpfull: Yes(22) No(1)

L.C.M of 4,6,8,10 is 120 so bell will ring together after 120 min or 2 hrs..
ans = 2 + 2 = 4 A.M
13 years agoHelpfull: Yes(6) No(0)
L.CM of 4,8,6,10 IS 120 SO, 120 MIN i.e 2 hours
so, ans is 2 am + 2hr = 4 am
3 years agoHelpfull: Yes(0) No(0)

TCS Other Question

The mean salary of all employee of an institute is Rs 18000. Mean annual salary for males and females respectively are Rs 24000 and Rs 14000. What is the percentage of female employee of the institute.
Ramu & Sangeetha went for biological analysis to an island which is 34km from their place. They traveled in a boat which went at a speed of 2m/s. when they are in half a distance in the boat Sangeetha noted there are 7 leg & 8 leg octopuses under the water. Ramu counted the total number of legs of octopuses and got 54. Sangeetha instantly said I know how many 7 legged octopuses are there under the water. They both reached the island after 20 min they left. How many seven legged octopuses does Sangeetha calculate?
a)2 b)5 c)6 d)7