
F.3 CH3 百分法(二)Quiz
Authored by 蕭宇倫先生 Xiao Alan
English
9th - 12th Grade

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29 questions
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1.
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1 min • 1 pt
一束鮮花原來的售價是$500。該售價先減少10%,再減少20%,然後增加了30%。求該束鮮花的新售價。
2.
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1 min • 1 pt
一盞吊燈的價值由2017年至2018年增加了5%,由2018年至2019年則減少了40%。該吊燈在2019年的價值是$2835。求它在2017年的價值。
3.
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1 min • 1 pt
去年永康的總收入較前一年的減少了22%,今年他的總收入卻較去年的增加了10%。與2年前比較,今年他的總收入的整體百分變化是多少?
4.
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1 min • 1 pt
某羽毛球會有50名男生和36名女生。若男生的人數減少了16%,但女生的人數增加了25%,求新的男生和女生總人數。
5.
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1 min • 1 pt
一個平行四邊形的底和高分別是20cm和8cm。若它的底增加了17%,而它的高則減少了30%,求該平行四邊形的面積的百分變化。
6.
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1 min • 1 pt
製造一輛玩具車的成本的比是3:2:5。若原料成本和包裝成本分別增加了14%和20%,而人工成本則減少了11%,求製造該玩具車的成本的百分變化。
7.
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1 min • 1 pt
某城市今年的人口是45000。假設人口每年以固定的率2%增加。求增長因子。
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