IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 822 - 826 of 1042
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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 | |
Question 824
Question
MCQ▾If the cost price is 96 % of the selling price, then what is the profit percentage?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 4.17 % | |
b. | 4.25 % | |
c. | 5 % | |
d. | 6.23 % | |
Question 825
Question
MCQ▾A roofer՚s 29 feet ladder is against the side of a house. It is 7 yards from the ground to the top of the house. How far away from the house must he place the foot of the ladder in order to have the top of the ladder meet the roof of the house?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 10 feet | |
b. | 25 feet | |
c. | 15 feet | |
d. | 20 feet | |
Question 826
Question
MCQ▾The ages of two persons differ by 16 years. If 6 years ago the elder one be 3 times as old as the younger one, find their present ages.
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 14 years, 30 years | |
b. | 15 years, 30 years | |
c. | 12 years, 25 years | |
d. | Question does not provide sufficient data or is vague | |