IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 576 - 581 of 931

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Question 576

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Question

MCQ▾

If and , then value of is________.

Choices

Choice (4)Response
a.1890
b.1895
c.1880
d.1885

Question 577

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Question

MCQ▾

A man purchases an blander whose printed price is Rs. 2200. If he received two successive discounts of and, he paid________

Choices

Choice (4)Response
a.Rs. 1221
b.Rs. 1232
c.Rs. 1121
d.Rs. 1132

Question 578

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Question

MCQ▾

If , then values of x are________

Choices

Choice (4)Response
a.x = 1 and x = 5
b.x = 5 and x=-1
c.x = 2 and x = 3
d.x=-1 and x=-3

Question 579

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Question

MCQ▾

Group the given figures into three classes using each figure only once.

The different shape available in this image and find the group

The Different Shape Available in this Image and Find the Group

Loading image

Choices

Choice (4)Response
a.
b.
c.
d.

Question 580

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Question

MCQ▾

In a class test, in English, 25 students scored 70 marks, 40 students scored 65 marks and 35 scored 50 marks. The mean of their score is (approximately) ________

Choices

Choice (4)Response
a.45 marks
b.29 marks
c.61 marks
d.65 marks

Question 581

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Question

MCQ▾

The average of 20 numbers is calculated as 30. It is discovered later on that while calculating the average one number, namely 40 was wrongly read as 20. The correct average is________

Choices

Choice (4)Response
a.25
b.28
c.31
d.26