2017AMC10B 2017AMC10B Problem 1 Marythoughtofapositivetwo-digitnumber.Shemultiplieditby andadded .Thenshe switchedthedigitsoftheresult,obtaininganumberbetween and ,inclusive.WhatwasMarys number? Mary想出了一个2位正数。她把它乘以 再加上11.之后把所得结果的两位数字交换位置,得 71 75 71 75 Mary ?
2017 AMC 10B Problem 1 Mary thought of a positive two-digit number. She multiplied it by and added . Then she switched the digits of the result, obtaining a number between and , inclusive. What was Mary's number?Mary想出了一个两位正数。她把它乘以3再加上11。之后把所得结果的两位数字...
2017 AMC 10B Problems Problem 1 Mary thought of a positive two-digit number. She multiplied it by and added . Then she switched the digits of the result, obtaining a number between and , inclusive. What was Marys number? Problem 2 Sofia ran laps around the -meter track at her school. ...
Chloe had correct answers to only of the problems she solved alone, but overall of her answers were correct. Zoe had correct answers to of the problems she solved alone. What was Zoes overall percentage of correct answers? Problem 15 In the arrangement of letters and numerals below, by how...