If 450567 passengers travel everyday through Depok airport, 68113 passengers travel through Semarang airport, 188250 passengers travel through Bekasi airport and 787996 passengers travel through Medan airport, how many passengers in total travel through these four cities everyday?

Fajar gets a salary of Rp 73200 every month and he sends Rp 10800 out of that to his parents. The ratio of the money he sends to his parents to the amount he has left over is:

Zulfikar and Intan are friends and swimming coach too. Zulfikar goes to Apeejay school every 3 days and Intan goes to Apeejay every 7 days to deliver coaching classes. If they both delivered the coaching sessions today, how many days in the next 84 days they both would take the session on the same day ?