Hi , This is a questions from one of your CAT exams for data sufficiency : If x, y and z are integers, what is y - z? (1) 100^x = 2^y5^z (2) 10^y = 20^x5^z+1 The answer to this says it is A. But shouldnt the answer be C From statement 2 : We can easily decipher 10^2 = 20^1 x 5^0+1 Henxw y = 2 ; x =1...