state gov OSSSC Junior Assistant & Panchayat Executive Officer Mock Test 2023 Quantitative Aptitude Number System LCM and HCF
There are three consecutive road crossings at which traffic lights change after every 35 seconds, 42 seconds and 90 seconds, respectively. If the lights are set on simultaneously at 8:00:00 hours, then after how much time will they change again simultaneously?
1
7 minutes 20 seconds
2
9 minutes 30 seconds
3
9 minutes 10 seconds
4
10 minutes 30 seconds