A owns a house worth Rs. 10000. He sells it to B at a profit of 10% based on the worth of the house. B sells the house back to A at a loss of 10% in this transaction A gets:

A. No profit No loss
B. Profit of Rs. 1000
C. Profit of Rs. 1100
D. Profit of Rs. 2000
Explanation:
B = 110% of Rs. 10000 = Rs. 11000
Loss of B = 10%
B = 90% of Rs. 1100 = Rs. 9900
A = Rs. 9900
= [(10% of Rs. 10000) + (10000 – 9900)] = Rs. 1100