# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 600 - 606 of 931

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## Question 600

### Question

MCQ▾The mean weight of 120 students in a class is 100 kg. The mean weight of boys is 110 kg while that of the girls is 90 kg. The number of boys and girls are________

### Choices

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

a. | 10,50 | |

b. | 70,40 | |

c. | 40,30 | |

d. | 60,60 |

## Question 601

### Question

MCQ▾The median of the observation 3, 5, 9, 5,4, 3,1 is ________

### Choices

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

a. | 1 | |

b. | 4 | |

c. | 5 | |

d. | 3 |

## Question 602

### Question

MCQ▾In a km. race A beats B by 50 metres or 5 seconds. Then A՚s time over the course is ________

### Choices

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

a. | 3 minutes 17 seconds | |

b. | 2 minutes 35 seconds | |

c. | 1 minutes 35 seconds | |

d. | 2 minutes 20 seconds |

## Question 603

### Question

MCQ▾If the mode of the following data 6, 8,7, 6, x, 6, 4, 8, 7,4, 8,7 is 6, then value of x is ________

### Choices

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

a. | 4 | |

b. | 8 | |

c. | 1 | |

d. | 6 |

## Question 604

## Question 605

### Question

MCQ▾If in the following groups of numbers after adding all the digits of each group, are arranged in decreasing order, then which will be middle group?

853, 395, 486, 249, 497,766, 914

### Choices

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

a. | 497 | |

b. | 395 | |

c. | 486 | |

d. | 766 |

## Question 606

### Question

MCQ▾A man rows downstream 40 50 km and upstream 20 30 km, taking 10 20 hours each time. The velocity of current is ________

### Choices

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

a. | 2.5 km/hr | |

b. | 3.5 km/hr | |

c. | 0.5 km/hr | |

d. | 1.5 km/hr |