1 votes 1 votes The traffic lights at three different road crossings change every $16,24$ and $54$ seconds respectively. If they have changed simultaneously at $5$ AM, how many more times will they have changed simultaneously by $5:37$ AM? $7$ $6$ $8$ $5$ Verbal Aptitude tbb-aptitude-2 + – Bikram asked Nov 30, 2016 • edited Aug 14, 2019 by go_editor Bikram 236 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 2 votes 2 votes here LCM of 432 seconds. It means that after every 432 seconds they have changed simultaneously. There will 5 times in 37 mins when they changed simultaneously. so answer is (D) Sonali Rangwani answered Feb 4, 2017 • selected Aug 15, 2019 by Bikram Sonali Rangwani comment Share Follow See all 0 reply Please log in or register to add a comment.