# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 17 - 22 of 1022

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## Question 17

### Question

MCQ▾Which of the following number is not prime?

### Choices

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

a. | 3 | |

b. | 4 | |

c. | 2 | |

d. | 5 |

## Question 18

### Question

MCQ▾A tank contains 1000 liters of water. Due to a small hole in the tank, the quantity of water is decreasing at the rate of 10 liters every hour. What will be the quantity of the water in the tank after 20 hours?

### Choices

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

a. | 210 liters | |

b. | 900 liters | |

c. | 800 liters | |

d. | 490 liters |

## Question 19

### Question

MCQ▾If P: When two negative integers are added we always get a negative integer.

q: When two positive integers are added, we get a positive integer, then

### Choices

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

a. | P and q are false | |

b. | P and q are true | |

c. | P is true and q is false | |

d. | P is false and q is true |

## Question 20

### Question

MCQ▾Which of the following number sentence below best describes the problem shown on the number line?

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 21

## Question 22

### Question

MCQ▾Which of the following number sentence below best describes the problem shown on the number line?

### Choices

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

a. | ||

b. | ||

c. | ||

d. |