# NCO- Cyber Olympiad (SOF) Class 9: Questions 79 - 83 of 522

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## Question number: 79

» Mental Ability » Basic Algebra

### Question

then equals

### Choices

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

a. | 9 | |

b. | 6 | |

c. | 0 | |

d. | 3 |

## Question number: 80

» Mental Ability » Basic Arithmetic

### Question

A man had 30 mobiles. All but 8 mobile not working, how many was he left with?

### Choices

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

a. | 21 | |

b. | 22 | |

c. | 77 | |

d. | 17 |

## Question number: 81

» Verbal Reasoning » Odd Man Out

### Question

In the question, there are four choices. Three of them are like and one different. Find the odd one out.

### Choices

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

a. | Inkpen | |

b. | Ballpen | |

c. | Eraser | |

d. | Pencil |

## Question number: 82

» Mental Ability » Basic Geometry

### Question

The series of diagrams called PROBLEM FIGURES consists of figures in a particular sequence. You have to pick out the figure from the given options, which should come at the end of problem figures.

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question number: 83

» Mental Ability » Basic Arithmetic

### Question

How many liters of nitrogen solution should be added to 20 liters of a nitrogen solution to make a solution?

### Choices

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

a. | 60 liters | |

b. | 30 liters | |

c. | 90 liters | |

d. | 20 liters |