CTET 2 Math and Science 3 Jan 2022 Paper

An orphanage has three gates, a person enters the orphanage, with some fruits and gives half of the fruits and one more to the children at the first gate, similarly he gives half of the remaining fruits and one more to the children at the second gate and likewise at the third gate. At the end the person is left with only one fruit. How many fruits were in the hands of that person in starting? For solving this problem, which one of the following methods will be appropriate: