# IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 148 - 156 of 1059

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## Question 148

## Question 149

### Question

MCQ▾The least number which when increased by 6 is exactly divisible by 12,24 and 48 is

### Choices

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

a. | 23 | |

b. | 54 | |

c. | 36 | |

d. | 42 |

## Question 150

### Question

MCQ▾The reciprocal of the smallest prime is

### Choices

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

a. | 0 | |

b. | 2 | |

c. | 1 | |

d. |

## Question 151

### Question

MCQ▾Which of the following is a perfect square?

### Choices

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

a. | 49 | |

b. | 68 | |

c. | 56 | |

d. | 48 |

## Question 152

### Question

MCQ▾Which of the following is the pair of twin primes?

### Choices

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

a. | (5,11) | |

b. | (7,11) | |

c. | (17,19) | |

d. | (19,23) |

## Question 153

### Question

MCQ▾The HCF of two numbers is 54. If one number is 27 and another is 162, then the LCM is

### Choices

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

a. | 81 | |

b. | 51 | |

c. | 85 | |

d. | 31 |

## Question 154

## Question 155

### Question

MCQ▾The numbers which have only two factors (1 and the number itself) are called as

### Choices

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

a. | Prime | |

b. | Composite | |

c. | Even | |

d. | Question does not provide sufficient data or is vague |

## Question 156

### Question

MCQ▾Multiplying three negative integers with a positive integer gives a ________ result.

### Choices

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

a. | Positive | |

b. | 0 | |

c. | Negative | |

d. | None of the above |