IMO- Mathematics Olympiad Class 8: Questions 832 - 838 of 1029
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Question number: 832
Question
Dishant gets 2 marks for each correct answer and loses 1 marks for each wrong answer. He attempts 60 problems and obtains 15 marks. The number of problem solved correctly is________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 25 |
|
| b. | 18 |
|
| c. | 10 |
|
| d. | 21 |
|
Question number: 833
Question
If students of a class of strength 90 are girls, then number of boys equals________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 50 |
|
| b. | 30 |
|
| c. | 40 |
|
| d. | 10 |
|
Question number: 834
Question
Vimal is traveling at an average rate of 40 miles per hour. How far does he travel in 1 hours?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 60 miles |
|
| b. | 100 miles |
|
| c. | 50 miles |
|
| d. | 20 miles |
|
Question number: 835
Question
The average age of 4 boys is 25 years and their ages are in proportion 1: 2: 3: 4, the age of youngest girl is________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 4 years |
|
| b. | 5 years |
|
| c. | 10 years |
|
| d. | 9 years |
|
Question number: 836
Question
Two pens and three pencils cost Rs. 80. Four pens and a pencils cost Rs. 112. Find the cost of the pen.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 11 |
|
| b. | 25 |
|
| c. | 30 |
|
| d. | 35 |
|
Question number: 837
Question
The total area of a semicircle and a rectangle is equal to 177 sq. cm. The diameter of the circle is 14 cm and the length of the rectangle is 20 cm. The perimeter of a rectangle is________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 40 cm |
|
| b. | 60 cm |
|
| c. | 55 cm |
|
| d. | 50 cm |
|
Question number: 838
Question
The average age of 3 girls is 15 years and their ages are in proportion 3: 5: 7, the age of youngest girl is________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 4 years |
|
| b. | 9 years |
|
| c. | 5 years |
|
| d. | 10 years |
|