IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 612 - 618 of 930
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Question 612
Question MCQ▾
The mean of 13 observations is 14. If the mean of the first 7 observations is 12 and that of the last 7 observations is 16, then the 7th observation is ________
Choices
Choice (4) | Response | |
---|---|---|
a. | 14 | |
b. | 18 | |
c. | 12 | |
d. | 16 |
Question 613
Question MCQ▾
In the given question, which number can replace the question mark
Choices
Choice (4) | Response | |
---|---|---|
a. | 1 | |
b. | 7 | |
c. | 36 | |
d. | 9 |
Question 614
Question MCQ▾
A man purchases an electric heater whose printed price is ₹ 160. If he received two successive discounts of and , he p
Choices
Choice (4) | Response | |
---|---|---|
a. | ₹ 112 | |
b. | ₹ 129.60 | |
c. | ₹ 119.60 | |
d. | ₹ 115.20 |
Question 615
Question MCQ▾
If , then values of y are________
Choices
Choice (4) | Response | |
---|---|---|
a. | y = 20 and y = 30 | |
b. | y = 15 and y =-10 | |
c. | y = 25 and y = 5 | |
d. | y =-10 and y =-30 |
Question 616
Question MCQ▾
Algebraic sum of the deviation of a set of values of a data from their mean is ________
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 617
Question MCQ▾
Rakesh has dollars more than Mohan has, and together they have a total of dollars. Which of the following represented the number of dollars than Mohan has?
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 618
Question MCQ▾
In the figure , and , if , what is the length of ?
Choices
Choice (4) | Response | |
---|---|---|
a. | 1 | |
b. | 4 | |
c. | 2 | |
d. | 3 |