# Number Systems (IMO- Mathematics Olympiad Class 6): Questions 52 - 57 of 82

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## Question number: 52

» Number Systems

### Question

Product of two integer is If one of the integers is , then the other is

### Choices

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

a. | 19 | |

b. | 1 | |

c. | 0 | |

d. | -9 |

## Question number: 53

» Number Systems

### Question

The expression is equivalent to , uses the ________ property.

### Choices

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

a. | Associative | |

b. | Closure | |

c. | Identity | |

d. | Commutative |

## Question number: 54

» Number Systems

### Question

Multiply the unit’s place of the number obtained by reversing the digits of the number 78923 with the hundred’s place of the number obtained by interchanging the digits in the unit’s place and the thousand’s place of the same number, we get________.

### Choices

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

a. | 54 | |

b. | 64 | |

c. | 16 | |

d. | 63 |

## Question number: 55

» Number Systems

### Question

Subtract the number obtained by reversing the digits of the number 20198 from the number obtained by interchanging the digits in the unit’s place and the hundred’s place of the same number, we get________.

### Choices

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

a. | 77121 | |

b. | - 68229 | |

c. | 68004 | |

d. | - 68211 |

## Question number: 56

» Number Systems

### Question

Find the sum of the given expression.

### Choices

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

a. | 55 | |

b. | - 100 | |

c. | - 90 | |

d. | 100 |

## Question number: 57

» Number Systems

### Question

Multiplying a negative integer for even number of times gives a ________ result.

### Choices

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

a. | 0 | |

b. | Negative | |

c. | Positive | |

d. | None of the above |