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

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## Question number: 1

» Mental Ability

### Question

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 number: 2

» Mental Ability

### Question

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 number: 3

» Mental Ability

### Question

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 number: 4

» Mental Ability

### Question

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 number: 5

» Mental Ability

### Question

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 number: 6

» Mental Ability

### Question

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 Rs. 520, Y has________

### Choices

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

a. | Rs. 1500 | |

b. | Rs. 1950 | |

c. | Rs. 1780 | |

d. | Rs. 1420 |