Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Quantitative Aptitude Number System LCM and HCF
Three persons are walking around a ground. They take 20, 30 and 40 minutes to complete one round. If they start form a single point together, they will meet again at that point after.
1
1 hour
2
\(1\frac{1}{2}\) hour
3
2 hour
4
\(2\frac{1}{2}\) hour