# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 564 - 572 of 1040

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## Question number: 564

» Direct and Inverse Proportions

### Question

The ratio which bears to is________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 1.68 | |

b. | 1.78 | |

c. | 1.64 | |

d. | 1.50 |

## Question number: 565

### Question

The value of , is________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 4 | |

b. | 3 | |

c. | 7 | |

d. | 5 |

## Question number: 566

» Direct and Inverse Proportions

### Question

A man completes of a job in 15 days. At this rate how many more days will it take him to finish the job?

### Choices

Choice (4) | Response | |
---|---|---|

a. | 22.5 | |

b. | 22 | |

c. | 27 | |

d. | 25 |

## Question number: 567

» Direct and Inverse Proportions

### Question

can do a piece of work in 10 days and can do alone it in 12 days. B works at it for 5 days and then leaves. alone can finish the remaining work in________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 5.8 days | |

b. | 6.5 days | |

c. | 6 days | |

d. | 7.5 days |

## Question number: 568

### Question

If , then the value of a is

### Choices

Choice (4) | Response | |
---|---|---|

a. | 3 | |

b. | 4 | |

c. | 1 | |

d. | 2 |

## Question number: 569

» Direct and Inverse Proportions

### Question

1.20 of a number equals 0.36 of another number. The ratio of the number is________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 3: 2 | |

b. | 2: 3 | |

c. | 3: 10 | |

d. | 10: 3 |

## Question number: 570

» Direct and Inverse Proportions

### Question

If 4 men take an hour to dig a ditch, how long should it take 10 men to dig a ditch of the same type?

### Choices

Choice (4) | Response | |
---|---|---|

a. | 23 min | |

b. | 20 min | |

c. | 30 min | |

d. | 24 min |

## Question number: 571

### Question

Number of prime factors in is

### Choices

Choice (4) | Response | |
---|---|---|

a. | 20 | |

b. | 22 | |

c. | 23 | |

d. | 28 |

## Question number: 572

» Direct and Inverse Proportions

### Question

If A: B = 3: 4 and B: C = 5: 6, then C: A is equal to, ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 24: 15 | |

b. | 12: 23 | |

c. | 15: 14 | |

d. | 25: 14 |