IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 813 - 818 of 1040
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Question number: 813
Question
Reena correctly answered 40 % of the questions in a maths test contained exactly 60 questions. How many of the questions did he answer incorrectly?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 34 |
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| b. | 36 |
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| c. | 38 |
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| d. | 35 |
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Question number: 814
Question
Amit wrongly answered 30 % of the questions in a chemistry test contained exactly 100 questions. How many of the questions did he answer correctly?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 40 |
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| b. | 60 |
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| c. | 50 |
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| d. | 70 |
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Question number: 815
Question
If students of a class of strength 200 are girls, then number of boys equals________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 130 |
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| b. | 150 |
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| c. | 160 |
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| d. | 110 |
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Question number: 816
Question
At 7.00 am, the temperature was -6F, The temperature was 7F higher at noon. Which one of the following expression can be used to calculate the temperature at noon?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
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| b. |
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| c. |
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| d. | None of the above |
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Question number: 817
Appeared in Year: 2012
Question
The ratio of present ages of Rahul and Deepesh is 3: 5.10 years later this ratio becomes 5: 7. What is the present age of Deepesh?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 10 years |
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| b. | 25 years |
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| c. | 15 years |
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| d. | 20 years |
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Question number: 818
Question
Priya goes to a shop to buy a dress costing Rs. 2000 including sales tax of 10%. He asks the shopkeeper to reduce the price of the watch so that he can save an amount equal to the sales tax. The reduction in the price of the dress is________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Rs 200 |
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| b. | Rs 150 |
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| c. | Rs 250 |
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| d. | All of the above |
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