# IMO- Mathematics Olympiad Class 8: Questions 538 - 545 of 1029

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## Question number: 538

» Direct and Inverse Proportions

### Question

The ratio of boys and girls in a school of 650 students is . How many boys should be admitted to make ratio ?

### Choices

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

a. | 140 | |

b. | 130 | |

c. | 150 | |

d. | 120 |

## Question number: 539

### Question

The value of

### Choices

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

a. | 7 | |

b. | 1 | |

c. | 5 | |

d. | 6 |

## Question number: 540

### Question

The value of is ________.

### Choices

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

a. | 100 | |

b. | 200 | |

c. | 800 | |

d. | 400 |

## Question number: 541

» Direct and Inverse Proportions

### Question

The ratio which bears to is________.

### Choices

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

a. | 1.50 | |

b. | 1.65 | |

c. | 1.68 | |

d. | 1.78 |

## Question number: 542

» Direct and Inverse Proportions

### Question

If and , then the value of is ________.

### Choices

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

a. | 10 | |

b. | 6 | |

c. | 8 | |

d. | 9 |

## Question number: 543

» Direct and Inverse Proportions

### Question

A sum of money is sufficient to pay wages for 25 days and wages for 25 days. The same money is sufficient to pay the wages of both for ________.

### Choices

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

a. | 11 days | |

b. | days | |

c. | 10 days | |

d. | 12 days |

## Question number: 544

» Direct and Inverse Proportions

### Question

A bag contains 25 paise, 10 paise and 5 paise coins in the ratio 1: 4: 5. If their total value is Rs. 90, the number of 10 paise coins is ________.

### Choices

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

a. | 400 | |

b. | 500 | |

c. | 800 | |

d. | 600 |

## Question number: 545

» Direct and Inverse Proportions

### Question

If A: B = 1: 4 and B: C = 3: 5, then C: A is equal to, ________.

### Choices

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

a. | 24: 15 | |

b. | 25: 14 | |

c. | 3: 20 | |

d. | 20: 3 |