NCHMCT JEE 2016 Question Paper with solutions for online practice

Question : 4 of 200

Marks: +1, -0

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?

Validate

Solution:

L.C.M. of 2, 4, 6, 8, 10 and 12
= 120 seconds
= 2 minutes
Required number of times
=

{30}/2

= 15 times

Go to Question:

Prev Question

Next Question