# Mental Ability [NSO Level 1- Science Olympiad (SOF) Class 8]: Questions 1 - 6 of 104

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## Question 1

### Question

MCQ▾Which of the following statement is false?

### Choices

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

a. | The orthocenter of a right angled triangle is the vertex containing right angles | |

b. | The circumcentre of a right angled triangle is the midpoint of its hypotenuse | |

c. | The centroid of a right angled triangle lies in the interior of the triangle | |

d. | None of the above |

## Question 2

### Question

MCQ▾Find the smallest number of four digits exactly divisible by 6,12, 20 and 36.

### Choices

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

a. | 1020 | |

b. | 1120 | |

c. | 1080 | |

d. | 1045 |

## Question 3

### Question

MCQ▾The length of a rectangle is triple while its breath is halved. What is the percentage change in area?

### Choices

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

a. | 50 % | |

b. | 30 % | |

c. | No Change | |

d. | 20 % |

## Question 4

### Question

MCQ▾The length of a rectangle is halved while its breath is double. What is the percentage change in area?

### Choices

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

a. | No Change | |

b. | 50 % | |

c. | 30 % | |

d. | 20 % |

## Question 5

### Question

MCQ▾Four different electronic devices make a beep after every 30 minutes, 1 hour, 1 hour 45 minutes and 2 hour respectively. All the devices beeped together at 12 noon. They will again beep together at

### Choices

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

a. | 3 am | |

b. | 12 midnights | |

c. | 2 am | |

d. | 6 pm |

## Question 6

### Question

MCQ▾A՚s money is to B՚s money as 4: 5 and B՚s money is to C՚s money as 2: 6. If A has ₹ 520, Y has________

### Choices

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

a. | ₹ 1500 | |

b. | ₹ 1950 | |

c. | ₹ 1780 | |

d. | ₹ 1420 |