A number is increased by 50% and then decreased by 30%. What is the net increase or decrease? A. 15% increase B. 15% decrease C. 20% increase D. 20% decrease 相关知识点: 试题来源: 解析 A。假设这个数是100,增加50%后变为150,再减少30%变为105,所以是增加了5,5占100的5%,但是是在...
A number is increased by 20% and then decreased by 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...
A number is increased by 5 and the result is 15. What is the original number? A. 10 B. 11 C. 12 D. 13 相关知识点: 试题来源: 解析 A。设原数为 x,x + 5 = 15,解得 x = 10。B 选项 11 不符合;C 选项 12 不符合;D 选项 13 不符合。
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...
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...
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 ...
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. 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...
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,...
【题目】(8) A number is increased by 5, then multiplied by 5, then reduced by 5,and finally divided by 5. The result is 5. The number is( ). 答案 【解析】(8)1相关推荐 1【题目】(8) A number is increased by 5, then multiplied by 5, then reduced by 5,and finally divided by...