# NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 638 - 640 of 1484

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## Question number: 638

» Mathematics » Triangles

MCQ▾

### Question

From the given figure the value of x is ________ if .

### Choices

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

a. | 24 | |

b. | 21 | |

c. | 13 | |

d. | 42 |

## Question number: 639

» Mathematics » Quadratic Equations

MCQ▾

### Question

The roots of the equation are integers, if ________.

### Choices

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

a. |
| |

b. | b and c are integers | |

c. | b and c are even integers | |

d. | is the square of an integer and b is an integer |

## Question number: 640

» Mathematics » Triangles

MCQ▾

### Question

In the bisector of intersects BC in M. If BM: MC = 5: 15 and AB = 2.5 cm then AC = ________.

### Choices

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

a. | 7.5 cm | |

b. | 2.5 cm | |

c. | 5 cm | |

d. | 3 cm |