# IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 683 - 690 of 1059

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## Question 683

### Question

MCQ▾A circle has

### Choices

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

a. | Three lines of symmetry | |

b. | One line of symmetry | |

c. | Two lines of symmetry | |

d. | Infinite lines of symmetry |

## Question 684

## Question 685

### Question

MCQ▾Which of the following has the maximum shaded area?

### Choices

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

a. | (iii) | |

b. | (ii) | |

c. | (i) | |

d. | (i) and (ii) |

## Question 686

## Question 687

### Question

MCQ▾If a: b = c: d, then is equal to

### Choices

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

a. | na: mb | |

b. | m: n | |

c. | md: nc | |

d. | a: b |

## Question 688

## Question 689

### Question

MCQ▾The area of a square is numerically double of the perimeter of the square, then the side of square is

### Choices

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

a. | 6 | |

b. | 9 | |

c. | 8 | |

d. | 7 |