# NSTSE (National Science Talent Search Exam- Unified Council) Class 7: Questions 778 - 784 of 1732

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## Question 778

### Question

MCQ▾Which of the following statement is false?

### Choices

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

a. | , if n is an even integer | |

b. | For any rational number a, | |

c. | If then n = 1 | |

d. | All of the above |

## Question 779

### Question

MCQ▾When two line segments meet at a point forming right angle they are said to be ________ to each other.

### Choices

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

a. | Perpendicular | |

b. | Parallel | |

c. | Equal | |

d. | None of the above |

## Question 780

### Question

MCQ▾Find the area of the shaded region of the following figure.

ABCD is a rectangle having length 80 cm and breadth 40 cm. P, Q, R and S are midpoints of AB, BC, CD and AD respectively.

### Choices

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

a. | 400 | |

b. | 800 | |

c. | 1600 | |

d. | 3200 |

## Question 781

### Question

MCQ▾Conjugate surd of is

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 782

## Question 783

### Question

MCQ▾If two angles in a triangle are and , then the third angle is

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 784

### Question

MCQ▾The identity element w. r. t multiplication in integers is ________.

### Choices

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

a. | 1 | |

b. | -1 | |

c. | 0 | |

d. | None of the above |