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Authored by Ace Ice

Mathematics

9th Grade

Used 1+ times

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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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