# NSTSE (National Science Talent Search Exam- Unified Council) Class 7: Questions 417 - 424 of 1732

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## Question 417

### Question

MCQ▾Identity element w. r. t. subtraction in integers is

### Choices

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

a. | Does not exist | |

b. | - 1 | |

c. | 1 | |

d. | 0 |

## Question 418

### Question

MCQ▾The solution of is

### Choices

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

a. | 2 | |

b. | 5 | |

c. | ||

d. | 1 |

## Question 419

### Question

MCQ▾The difference between the length and breadth of a rectangle is 46 m. If the perimeter is m, then the area is

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 420

### Question

MCQ▾In a , D is any point on AB and meets AC at E. If AD = 3.5 cm, DB = 3 cm and AE = 2 cm then AC = ________.

### Choices

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

a. | 6 cm | |

b. | 3.7 cm | |

c. | 6.5 cm | |

d. | 4 cm |

## Question 421

### Question

MCQ▾Number of pairs of parallel lines in the given figure is

### Choices

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

a. | 4 | |

b. | 1 | |

c. | 3 | |

d. | 2 |

## Question 422

## Question 423

### Question

MCQ▾A man purchased a bag of rice containing 50 kg for ₹ 150. He sold it at the rate of ₹ 3.25 per kg. Find the profit or less % .

### Choices

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

a. | gain | |

b. | 12 % gain | |

c. | loss | |

d. | 6 % loss |

## Question 424

### Question

MCQ▾If the radii of two concentric circles are 20 cm and 36 cm respectively, then the area of the circulating ring in sq cm will be

### Choices

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

a. | ||

b. | ||

c. | ||

d. |