The correct answer is A
Explanation
The correct answer is (A). If the tens digit is 1, there are 7 positive two-digit integers with the ones digit greater than twice the tens digit: 13 comma 14 comma 15 comma 16 comma 17 comma 18 and 19. If the tens digit is 2, there are 5 positive two-digit integers with the ones digit greater than twice the tens digit: 25, 26, 27, 28 and 29. If the tens digit is 3, there are 3 positive two-digit integers with the ones digit greater than twice the tens digit: 37, 38 and 39. If the tens digit is 4, there is 1 positive two-digit integer with the ones digit greater than twice the tens digit: . If the tens digit is equal to or greater than 5, then the ones digits, which cannot be greater than 9, is not greater than twice the tens digit. Therefore, there is a total of 7 + 5 + 3 + 1 = 16 positive two-digit integers for which the ones digit is greater than twice the tens digit.
>>点击查看SAT每日一问专题，阅读更多相关文章！
-
美国高考作文题目汇总：SAT写作历年题目
美国“高考(SAT)”的写作或作文题目是什么样的呢？小编整理了2012到2015年美国高考的作文题目也就是SAT写作历年题目让大家练练手。
- 【真题解析】详解新SAT语法考试中易混淆词汇题答题技巧
- SAT I 一日一问：2015年3月5日
- SAT I 一日一问：2015年3月4日
- SAT I 一日一问：2015年3月3日