TCS Company Numerical Ability LCM and HCF

Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together?
(a) 4 (b) 10 (c) 15 (d) 16

Read Solution (Total 2)

L.C.M of 2,4,6,8,10,12 is 120. i.e after each 2 min they will toll together.So in 30 min they will toll 15 times.As they have initially tolled once,The answer will be 15+1=16.
13 years agoHelpfull: Yes(20) No(6)

lcm of 2,4,6,8,12 =24 seconds later
13 years agoHelpfull: Yes(1) No(19)

TCS Other Question

. The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?
(a) 23 years (b) 24 years (c) 25 years (d) None of these The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller number?
(a) 240 (b) 270 (c) 295 (d) 360