SSC Delhi Police Constable 2025 Mock Test Series (New) Quantitative Aptitude Number System LCM and HCF
Three children are making cards for people at an old age home. They take 12 min, 18 min and 20 min respectively to complete a card. If they start making the cards at the same time, after how many minutes, will they again start a new card together?
1
140 min
2
110 min
3
130 min
4
180 min