IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 818 - 823 of 1042
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Question 818
Question
MCQ▾At what rate percent per annum will a sum of money double in 10 years?
Choices
Choice (4) | Response | |
---|---|---|
a. | 5 % | |
b. | 20 % | |
c. | 10 % | |
d. | 15 % |
Question 819
Question
MCQ▾The ratio of two numbers is 1: 2. Which of the following ratio is equivalent to 1: 2?
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 820
Question
MCQ▾A rectangular sheet of paper 30 cm X 18cm can be transformed into a right circular cylinder in two ways - by rolling the paper along its length or by rolling it along its breadth. Find the ratio of the volume of two cylinders formed.
Choices
Choice (4) | Response | |
---|---|---|
a. | 5: 3 | |
b. | 1: 5 | |
c. | 4: 3 | |
d. | 3: 2 |
Question 821
Question
MCQ▾A ladder is leaning against a house. The distance from the top of the ladder to the ground is 12 feet, and the distance from the foot of the ladder to the house is 4 feet. How tall is the ladder?
Choices
Choice (4) | Response | |
---|---|---|
a. | 13 feet | |
b. | 12.65 feet | |
c. | 12 feet | |
d. | None of the above |
Question 822
Question
MCQ▾Roshni՚s age after 15 years will be 5 times his age 5 years back. What is the present age of Roshni?
Choices
Choice (4) | Response | |
---|---|---|
a. | 25 years | |
b. | 10 years | |
c. | 20 years | |
d. | 30 years |
Question 823
Question
MCQ▾The average age of 2 boys is 14 years and their ages are in proportion 2: 5, the age of youngest girl is________.
Choices
Choice (4) | Response | |
---|---|---|
a. | 8 years | |
b. | 9 years | |
c. | 10 years | |
d. | 4 years |