IMO- Mathematics Olympiad Class 8: Questions 98 - 104 of 1029
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Question number: 98
» Linear Equations in One Variable
Question
A number consists of two digits whose sum is 9. If 63 is subtracted to the number, the digits are interchanged. The number is_.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 82 |
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| b. | 88 |
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| c. | 18 |
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| d. | 81 |
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Question number: 99
» Linear Equations in One Variable
Question
A number consists of two digits whose sum is 5. If 9 is added to the number, the digits are interchanged. The number is_.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 32 |
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| b. | 23 |
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| c. | 88 |
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| d. | 31 |
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Question number: 100
» Linear Equations in One Variable
Question
The value of for which is_.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 7 |
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| b. |
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| c. | 6 |
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| d. |
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Question number: 101
» Linear Equations in One Variable
Question
Solve for
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 9 |
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| b. |
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| c. | 2 |
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| d. | 1 |
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Question number: 102
» Linear Equations in One Variable
Question
A motor boat covers a certain distance downstream in a river in 1 hours. It covers the same distance upstream in 5 hours. The speed of the water is 6.0 km/hr. The speed of the boat in still water is_.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 9 km/hr |
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| b. | 19.5 km/hr |
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| c. | 5 km/hr |
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| d. | 11 km/hr |
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Question number: 103
» Linear Equations in One Variable
Question
A number 125 is divided into two parts in the ratio 2: 3. The product of the number is_.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 1550 |
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| b. | 3750 |
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| c. | 1250 |
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| d. | 3211 |
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Question number: 104
» Linear Equations in One Variable
Question
If the angles of a triangle are in the ratio 2: 4: 6, then the summation of the greatest and smallest angles is_.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
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| b. |
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| c. |
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| d. | 60 |
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