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 216 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.