153 is divisible by 3.
BTW.. even if that's not the case we will start with the remainder first and from there on we will eliminate 3 each round.
Well we may reduce the 15 mins to 5 - 10 mins also as idea is to finish the elimination in 3-6 hours.
I didn't want to do any calculations, thats why I was asking here😆
6 hours tak theek hai...agar 12 hours hua to kal mera IF pe aana ban ho jayega