IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 545 - 552 of 1040
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Question number: 545
» Direct and Inverse Proportions
Question
If A: B = 1: 4 and B: C = 3: 5, then C: A is equal to, ________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 25: 14 |
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| b. | 20: 3 |
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| c. | 3: 20 |
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| d. | 24: 15 |
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Question number: 546
Question
The solution of , is________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | -2 |
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| b. | -1 |
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| c. | 3 |
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| d. | 4 |
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Question number: 547
» Direct and Inverse Proportions
Question
can do a piece of work in 70 days. He works at it for 7 days and then alone finishes the work in 40 days. The two together could have completed the work in ________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 20.5 days |
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| b. | 23 days |
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| c. | 30 days |
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| d. | 23.8 days |
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Question number: 548
Question
The value of , is________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
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| b. |
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| c. |
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| d. |
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Question number: 549
» Direct and Inverse Proportions
Question
Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 5 minutes |
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| b. | 6 minutes |
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| c. | 2 minutes |
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| d. | 8 minutes |
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Question number: 550
Question
Which of the following values are equal?
(1) (2) (3) (4)
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 1 and 4 |
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| b. | 2 and 3 |
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| c. | 1 and 3 |
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| d. | 1 and 2 |
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Question number: 551
Question
Simplify:
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
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| b. |
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| c. |
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| d. | 1 |
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Question number: 552
Question
Given that and, then the value of is (approximately) ________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 4.39 |
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| b. | 4.00 |
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| c. | 4.57 |
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| d. | 4.21 |
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