IMO- Mathematics Olympiad (SOF) Class 8: Questions 498 - 505 of 1029
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Question number: 498
» Direct and Inverse Proportions
Question
A bag contains 25 paise, 10 paise and 5 paise coins in the ratio 2: 3: 4. If their total value is Rs. 20, the number of 5 paise coins is ________.
Choices
| Choice (4) | Response | |
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| a. | 50 |
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| b. | 80 |
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| c. | 60 |
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| d. | 70 |
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Question number: 499
Question
If and, then is equal to________.
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| Choice (4) | Response | |
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Question number: 500
» Direct and Inverse Proportions
Question
Two numbers are in the ratio 1: 3. If each number is increased by 9, the ratio becomes 3: 5. The numbers are________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 13,14 |
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| b. | 3.5,14.7 |
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| c. | 35,25 |
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| d. | 4.5,13.5 |
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Question number: 501
Question
The value of is ________.
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| Choice (4) | Response | |
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Question number: 502
» Direct and Inverse Proportions
Question
The ratio of boys and girls in a school of 660 students is. How many girls should be admitted to make ratio?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 50 |
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| b. | 60 |
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| c. | 40 |
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| d. | 30 |
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Question number: 503
» Direct and Inverse Proportions
Question
can do a piece of work in 50 days. He works at it for 5 days and then alone finishes the work in 30 days. The two together could have completed the work in ________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 17.5 days |
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| b. | 17 days |
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| c. | 18 days |
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| d. | 17.2 days |
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Question number: 504
Question
Number of prime factors in is
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 3 |
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| b. | 4 |
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| c. | 2 |
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| d. | 6 |
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Question number: 505
Question
If, then the value of is________.
Choices
| Choice (4) | Response | |
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| a. | 1 |
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| b. | 3 |
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| c. | 4 |
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| d. | 2 |
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