There are 3 temples in a corner of triagle and 1 pond in centre of triangle one person have some flowers he dipped in pond and those become double and he put few of them in 1st temple and goes to pond again ,dipped left ones & it become double he puts d same quanity as he put in 1st tmeple and repeats the same process for third temple but by the time he completed all temple he was left with no flowers.Can you tell what is the minimum number of flower he has started with ?