# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 551 - 555 of 1022

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## Question number: 551

### Question

The total cost of 5 books and 3 bags is Rs. 2500. If one book costs Rs. 25 less than one bag, find the price of each book and bag respectively.

### Choices

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

a. | Rs. 320, Rs. 380 | |

b. | Rs. 303, Rs. 328 | |

c. | Rs. 300, Rs. 320 | |

d. | Rs. 330, Rs. 308 |

## Question number: 552

### Question

Three bells toll at intervals of 12 seconds, 16 seconds and 18 seconds respectively. They start ringing together at a particular time. They next toll together after ________.

### Choices

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

a. | 2.8 minutes | |

b. | 2.4 minutes | |

c. | 3.2 minutes | |

d. | 1.2 minutes |

## Question number: 553

### Question

Equal sums of Rs. 3400 were lent to Kajal and Misha at 2 % per annum for a period of 3 years and 5 years respectively. Find the difference of the interest paid by Kajal and Misha.

### Choices

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

a. | Rs. 167 | |

b. | Rs. 260 | |

c. | Rs. 136 | |

d. | Rs. 366 |

## Question number: 554

### Question

When Ravesh travelled 45 km he found that of the entire journey was still left. The length of the journey left is

### Choices

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

a. | 67.5 km | |

b. | 45 km | |

c. | 150 km | |

d. | 112.5 km |

## Question number: 555

### Question

Three bells toll at intervals of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a particular time. They next toll together after ________.

### Choices

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

a. | 12 minutes | |

b. | 24 minutes | |

c. | 18 minutes | |

d. | 6 minutes |