If a number is doubled and then increased by 5, the result is 21. What is the original number? A. 8 B. 9 C. 10 D. 11 相关知识点: 试题来源: 解析 A。本题考查逆推法解决问题。设原数为 x,先双倍就是 2x,再增加 5 是 2x+5,已知结果是 21,即 2x+5=21,移项可得 2x=16,解得 ...
If a number is doubled and then increased by five. The result is twenty-five. What is the number? A. Ten B. Fifteen C. Twenty D. Twenty-five 相关知识点: 试题来源: 解析 A。设这个数是 x,2x + 5 = 25,2x = 20,x = 10。选项 A 是十,正确。选项 B 是十五,错误。选项 C 是二十...
In a brain teaser, if a number is doubled and then 5 is subtracted from it, the result is 11. What's the number? A. 8 B. 9 C. 10 D. 11 相关知识点: 试题来源: 解析 A。设这个数为 x,2x - 5 = 11,移项得 2x = 16,解得 x = 8。
The sum of the digits of a two digit number is 10. The number formed by reversing the digits is 18 less than the original number. Find the original number. View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Cla...
第1题 The school started ___ three hundred pupils; now the number is doubled.A、fromB、withC、offD、out第2题 John studied hard before the examination,and it paid ___.He made an A.A、outB、offC、forD、up第3题 This part of the country is rich ___ coal.A、onB、atC、inD...
number,数字,数量。primary schools,小学。rural areas,农村地区。由doubled可知这里是动词double的过去式和过去分词,意为“增加一倍,成为两倍”,主语The number是doubled的发出者,为主动语态,故排除选项A和B,且主语是单数,所以这里应用has。句意为“在过去的50年里,农村地区小学的数量翻了一番。”故答案为D。 nu...
相关知识点: 试题来源: 解析 E When the number n is doubled, 2n is obtained.When y is added, 2n+y is obtained.When this number is divided by 2, we obtain 12(2n+y)=n+y2 .When n is subtracted, y2 is obtained.反馈 收藏
16. A. numberB. amountC.trafficD. double 相关知识点: 试题来源: 解析 【答案】B【解析】A项(数字),读音为/ˈnʌmbə(r)/,重音在第一个音节上;B项(数量;金额),读音为/əˈmaʊnt/,重音在第二个音节上;C项(交通),读音为/ˈtræfɪk/,重音在第一个音节上;D项(双的),读音为...
【答案】D 【核心词语/词汇】 income 收入;double 双倍;five years ago 五年前 【翻译】他的收入是五年前的两倍。 【解析】此题考查英语中倍数的表达方式。英语中一种常见的表达倍数的方式为倍数+what引导的从句。what it was five years ago中的it指代his income. A选项that不能引导it was five years ag...
百度试题 结果1 题目Math.round(double d)方法的作用是,将一个数四舍五入,并返回一个double数。 A. 正确 B. 错误 相关知识点: 试题来源: 解析 B 正确答案:B 答案解析:Math.round(double d)方法,返回的是一个long类型的整数。反馈 收藏