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Authored by Ace Ice
Mathematics
9th Grade
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5 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
If a mixture contains 30% salt and weighs 200 grams, how much salt is in the mixture?
Хэрвээ давсны уусмал 30% давс агуулдаг ба өөрөө(уусмал) 200 грамм жинтэй бол түүнд хэдэн гр давс байгаа вэ ?
90 grams
60 grams
30 grams
100 grams
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A metal alloy is made of 60% copper and 40% zinc. If the total weight of the alloy is 500 grams, what is the weight of each metal?
Төмрийн хайлш 60 хувийн зэс 40 хувийн цайрнаас бүрддэг. Тэгвэл 500 г хайлшинд тус бүр хэдэн грамм металл агуулагдах вэ ?
Copper: 350 grams, Zinc: 150 grams
Copper: 400 grams, Zinc: 100 grams
Copper: 250 grams, Zinc: 250 grams
Copper: 300 grams, Zinc: 200 grams
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A mixture of two liquids is in the ratio 3:2. If the total volume of the mixture is 100 liters, how much of each liquid is there?
Хоёр шингэний харьцаа 3:2. Хэрвээ нийт шингэний эзлэхүүн 100 литр бол тус бүр хэдэн литр шингэн байгаа вэ?
First liquid: 70 liters, Second liquid: 30 liters
First liquid: 50 liters, Second liquid: 50 liters
First liquid: 40 liters, Second liquid: 60 liters
First liquid: 60 liters, Second liquid: 40 liters
4.
FILL IN THE BLANK QUESTION
1 min • 2 pts
Хэрвээ 100гр сахарын уусмалын концентраци 10% байснаа 15% болон нэмэгдсэн бол хэдэн гр сахар нэмсэн бэ?
Answer explanation
100%➡️10%
100гр➡️10гр
100гр-10гр=90гр
100%-15%=85%
85%➡️90гр
15%➡️х
х=(15×90)/85
х=15.88гр
5.
FILL IN THE BLANK QUESTION
1 min • 3 pts
24% концентрацитай 400гр уусмалд 46% концентрацитай 300гр уусмал нэмвэл уг холимог хэдэн хувийн концентрацитай болох вэ?
Answer explanation
400×0.24+300×0.46=243
700➡️243
100➡️х
Х=243/7=33.4
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