69. A positional numeral system use 'X' as its radix. In this system, number 252 equalsdec
問題詳情
69. A positional numeral system use 'X' as its radix. In this system, number 252 equalsdecimal number 209 as following equation: 252(x) = 209(10).What is the value of 'X'？ (A) 6 (B) 7 (C) 8 (D) 9