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 3 and the original number is 5, what is the new number? ___. A. 6 B. 7 C. 8 D. 9 相关知识点: 试题来源: 解析 C。解析:原数是5,增加3,即5 + 3 = 8,选项A“6”、选项B“7”和选项D“9”都不是正确结果,选项C“8”正确。反馈...
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...
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. ...
14. When a three-digit number is increased by 1, the sum is divisible by 15. When it is decreased by 3.the difference is divisible by 8. The sum of it and the number obtained from it by reversing the digits is di-visible by 10. What is the sum of the digits of this number?
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,相比原来减少了 4,减少的百分比是 4 除以 100 等于 4%。反馈...
If a number is increased by 20% and then the result is 60. What was the original number? A. 50 B. 48 C. 45 D. 40 相关知识点: 试题来源: 解析 A。解析:设原数为x,x乘以(1加20%)等于60,解得x等于50。本题考查数学中的方程思想和英语中百分数的表达。选项B、C、D不符合通过方程计算出...
百度试题 结果1 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 ( 1 ). 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
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。