# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 818 - 823 of 1042

Access detailed explanations (illustrated with images and videos) to **1042** questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. *Unlimited Access, Unlimited Time, on Unlimited Devices*!

View Sample Explanation or View Features.

Rs. 450.00 -OR-

How to register? Already Subscribed?

## 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 |