# NCO- Cyber Olympiad (SOF) Class 8: Questions 47 - 51 of 510

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## Question number: 47

» Mental Ability » Basic Arithmetic

### Question

A certain sum of simple interest becomes its three times in 30 years. In how many years will it becomes double?

### Choices

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

a. | 20 years | |

b. | 5 years | |

c. | 60 years | |

d. | 15 years |

## Question number: 48

» Mental Ability » Basic Arithmetic

### Question

If 16 employees can complete 32 tasks in 8 days, how many tasks can 8 employees complete in 4 days?

### Choices

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

a. | 16 | |

b. | 8 | |

c. | 12 | |

d. | 14 |

## Question number: 49

» Mental Ability » Number Games » Number Analogies

### Question

What least number must be subtracted from 136 to make it a perfect square?

### Choices

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

a. | 15 | |

b. | 8 | |

c. | 21 | |

d. | 7 |

## Question number: 50

» Mental Ability » Basic Geometry

### Question

If the radius of a cone is increased by 80%, its volume is increased by

### Choices

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

a. | 160% | |

b. | 40% | |

c. | 224% | |

d. | 112% |

## Question number: 51

» Logical and Analytical Reasoning » Analogy and Classification

### Question

Study the diagram given carefully and answer the question.

Employed engineers in town are represented by?

### Choices

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

a. | 6 | |

b. | 7 | |

c. | 5 | |

d. | 4 |