IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 807 - 811 of 1091
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Question 807
Question MCQ▾
Mansi gets 3 marks for each correct answer and loses 1 marks for each wrong answer. He attempts 100 problems and obtains 60 marks. The number of problem incorrect is________.
Choices
Choice (4) | Response | |
---|---|---|
a. | 50 | |
b. | 60 | |
c. | 40 | |
d. | 10 |
Question 808
Appeared in Year: 2012
Question MCQ▾
On the April 1,2012 Megha՚s salary increased from Rs 10,000 to Rs 16,000. Simultaneously the rate of income tax decreased by 37.5% . So the amount of income tax paid by Megha remains constant, what is the amount of income tax paid by her?
Choices
Choice (4) | Response | |
---|---|---|
a. | Rs 2000 | |
b. | Rs 1000 | |
c. | Rs 3000 | |
d. | None of the above |
Question 809
Question MCQ▾
Two bills of ₹ 6075 and ₹ 8505 respectively are to be paid by cheques of the same amount. What will be the largest possible amount of each cheque?
Choices
Choice (4) | Response | |
---|---|---|
a. | Rs 1340 | |
b. | Rs 1215 | |
c. | Rs 1223 | |
d. | None of the above |
Question 810
Question MCQ▾
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 | |
b. | 36 | |
c. | 38 | |
d. | 35 |
Question 811
Question MCQ▾
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 | |
b. | 60 | |
c. | 50 | |
d. | 70 |