# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 282 - 288 of 931

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## Question 282

### Question

MCQ▾In the medians XC, YB and ZA pass through O. If , then YB is ________

### Choices

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

a. | 19 | |

b. | 21 | |

c. | 26 | |

d. | 11 |

## Question 283

### Question

MCQ▾In the figure , and . If the exterior angle XZK is , then the angle NMX is ________

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 284

### Question

MCQ▾The number of spherical balls each 4 cm in diameter be made out of a rectangular solid is ________

### Choices

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

a. | 107 | |

b. | 105 | |

c. | 102 | |

d. | 109 |

## Question 285

### Question

MCQ▾The ratio between the perimeter and breadth of rectangle is . If the area of the rectangle is 116 sq. cm. then length of the rectangle is ________

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 286

### Question

MCQ▾The and are right angles. If , and , then the length of BD is ________

### Choices

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

a. | 16 cm | |

b. | 15 cm | |

c. | 12 cm | |

d. | 25 cm |

## Question 287

### Question

MCQ▾The volume of a sphere is the curved surface of its sphere is ________

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 288

### Question

MCQ▾The area of trapezium ABCD is ________

### Choices

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

a. | ||

b. | ||

c. | ||

d. |