Question

we can buy 1 banana in 1 RS. if we will give 3 wrappers of banana then we will get 1 banana.then how many bananas we can eat in 21 RS.

Answer 1

first we will give rs 21 and get 21 bananas
.....................................21 bananas now
we have 21 wrappers and we will give three wrappers to get one banana
so we will get 7 bananas
....................................21+7=28 bananas now
now we have 7 wrappers
we will give 6 wrappers and get 2 bananas
....................................28+2=30 bananas now
now we have 2 wrappers plus one wrapper from the last set which e did not use
so we will get one more banana
......................................30+1=32 bananas in total
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