Answer:
Rs 93.75
Step-by-step explanation:
Solution:
A man starts from his house with some money to visit four temples.
<u>1. As soon as he enters temple 1 his money gets doubled. </u>
Let he had money at first = 
After enter the 1st temple his money = 
He donated = Rs 100
Money left after donation at 1st temple = 
<u>2. At temple 2 again his money is doubled and he donates Rs 100</u>
He had at 2nd temple = 
Donated = Rs 100
Money left after donation at 2nd temple = 
<u>3. His money is doubled again at temple 3 and he donates Rs 100.</u>
He had at 3rd temple = 
Donated = Rs 100
Money left after donation at 3rd temple = 
<u>4. At temple 4 again his money gets doubled. He donates 100 rs. again and returns home empty handed.</u>
He had at 4th temple = 
Donated = Rs 100
Money left after donation at 4th temple = 
<u>As he returned empty hand or with zero money, equation will be:-</u>

Thus, he had Rs 93.75 when he started from his house.