If a number is increased by 10 and then divided by 2, the result is 15. What is the number? A. 20 B. 25 C. 30 D. 35 相关知识点: 试题来源: 解析 A。设这个数为 x,(x+10)÷2=15,解得 x=20。B 选项 25 不符合;C 选项 30 和 D 选项 35 都不对。
The price of a book is increased by 10%. The original price is 50 yuan. What's the new price? A. 55 yuan B. 60 yuan C. 45 yuan D. 50 yuan 相关知识点: 试题来源: 解析 A。解析:增加 10%,即变为原来的 110%,50 元的 110%是 55 元。B 选项 60 元错误;C 选项 45 元错误;D ...
The number of students in a school increased by 10%. There are now 550 students. How many students were there originally? A. 500 B. 450 C. 400 D. 350 相关知识点: 试题来源: 解析 A。设原来有 x 个学生,x 乘以(1 + 10%)等于 550,解得 x 等于 500。反馈 收藏 ...
If a number is increased by 20% and then decreased by 20%, the final number is what percentage of the original number? A. 96% B. 100% C. 104% D. 120% 相关知识点: 试题来源: 解析 A。本题考查数学推理中的百分比变化。设原数为 100,增加 20%后变为 120,再减少 20%,即 120 的 20...
What is the final percentage change compared to the original number? A. 4% decrease B. 4% increase C. No change D. 20% decrease 相关知识点: 试题来源: 解析 A。设这个数为 x,增加 20%后变为 1.2x,再减少 20%变为 1.2x×0.8 = 0.96x,所以相比原来减少了 4%。反馈 收藏 ...
A number is increased by 50% and the result is 150. What was the original number? A. 100 B. 120 C. 130 D. 140 相关知识点: 试题来源: 解析 A。解析:设原来的数为x,增加50%后的数就是x加上50%x,即x+0.5x = 1.5x。已知结果是150,那么1.5x = 150,x就等于150除以1.5,得到100,所以选...
If a number is increased by 20% and then decreased by 20%, what is the result compared to the original number? A. Same as the original number. B. Less than the original number. C. More than the original number. D. Cannot be determined. ...
If a number is increased by 20% and then decreased by 20%, what is the overall change? A. Decreased by 4% B. Increased by 4% C. No change D. Decreased by 20% 相关知识点: 试题来源: 解析 A。解析:设这个数为 100,增加 20%后是 120,再减少 20%是 120 乘以(1 - 20%)等于 96,...
If a number is increased by 20% and then decreased by 20%, what is the overall change? A. No change B. 4% decrease C. 4% increase D. 20% decrease 相关知识点: 试题来源: 解析 B。设这个数为 100,增加 20%后变为 120,再减少 20%,120×(1 - 20%) = 96,(100 - 96)÷100 = 4...
结果1 题目 A number is increased by 25% and the resulting number is then decreased by 20%. The final number iswhat percent of the original number? A. 90% B. 95% C. 100% D. 105% E. 120% 相关知识点: 试题来源: 解析 C 反馈 收藏 ...