state gov OSSSC Junior Assistant & Panchayat Executive Officer Mock Test 2023 Quantitative Aptitude Number System LCM and HCF
At a telephone exchange, three phones ring at intervals of 20 sec, 24 sec and 30 seconds - If they ring together at 11:25 am, when will they next ring together?
1
11:29 pm
2
11:27 am
3
11:51 am
4
12:29 pm