# IMO Level 1- Mathematics Olympiad (SOF) Class 5: Questions 87 - 93 of 888

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## Question number: 87

### Question

which of the following is true?

### Choices

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

a. |
| |

b. |
| |

c. | Both a. and b. are correct | |

d. | None of the above |

## Question number: 88

### Question

LXXXI – LXXX = ________.

### Choices

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

a. | 1 | |

b. | 0 | |

c. | 10 | |

d. | All of the above |

## Question number: 89

### Question

Given that 70 is the 2^{nd} common multiple of 5 and

. Find the smallest possible number for

### Choices

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

a. | 5 | |

b. | 9 | |

c. | 3 | |

d. | 7 |

## Question number: 90

### Question

Multiply the 3^{rd} multiple of by the 9^{th} multiple of 4. The answer is________.

### Choices

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

a. | 2 | |

b. | 27 | |

c. | 3 | |

d. | 4 |

## Question number: 91

### Question

Given that 18 is common multiple of

and 3. Find the greatest possible number for

### Choices

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

a. | 2 | |

b. | 10 | |

c. | 6 | |

d. | 9 |

## Question number: 92

### Question

Given that 10 is common multiple of

and 2. Find the greatest possible number for

### Choices

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

a. | 9 | |

b. | 2 | |

c. | 5 | |

d. | 10 |

## Question number: 93

### Question

what is the number in the START box?

### Choices

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

a. | 37 | |

b. | 71 | |

c. | 72 | |

d. | 27 |