Ratios
Tested in 2 real MPSC questions across 1 year (2017–2017). See it in context on the interactive Concept Graph →
Years it was asked
Real questions that test this
सहा घंटा सुरवातीला एकत्र वाजतात. आणि अनुक्रमे 2, 4, 6, 8, 10 आणि 12 सेकंदांनी वाजतात. 30 मिनिटांमध्ये त्या किती वेळा एकत्र वाजतील ? Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?
1)4
2)10
3)15
4)16✓ Correct
First find the LCM of intervals: LCM(2, 4, 6, 8, 10, 12) = 120 seconds = 2 minutes. In 30 minutes, the number of times they toll together = (30 / 2) + 1 = 16 times (including the initial simultaneous toll at 0 minutes).