IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 632 - 635 of 931
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Question 632
Question
MCQ▾If the mean of 10 observations is 20 and that of another 15 observations is 16, then the mean of 25 observations is ________
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 18.2 | |
b. | 17 | |
c. | 18 | |
d. | 17.6 | |
Question 633
Question
MCQ▾There are four pillars W, X, Y and Z of different heights. Three spiders A, B, C and D start to climb on these pillars simultaneously. In one chance A climbs on W 10 cm but slips down 2 cm. B climbs on X 15 cm but slips down 7 cm. C climbs on Y 14 cm but slips down 6 cm. D climbs on Z 17 cm but slips down 11 cm. if each requires 70 chances to reach the top of the pillar, what is the height of the shortest pillar?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 637 cm | |
b. | 431 cm | |
c. | 562 cm | |
d. | 573 cm | |
Question 634
Question
MCQ▾The graph of is
Choices
| Choice (4) | Response | |
|---|---|---|
a. | I | |
b. | IV | |
c. | II | |
d. | III | |
Question 635
Question
MCQ▾In the matrix there are eight designs and one space is left blank as shown by a question mark. Which answer figures will figures will replace the question mark?
Choices
| Choice (4) | Response | |
|---|---|---|
a. |  | |
b. |  | |
c. |  | |
d. |  | |