# Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 7]: Questions 28 - 37 of 1128

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## Question 28

### Question

MCQ▾The solution of is

### Choices

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

a. | 0.5 | |

b. | - 0.5 | |

c. | - 0.2 | |

d. | 0.3 |

## Question 29

### Question

MCQ▾The ratio of the heights of A and B is 5: 7. If B is 2.1 m tall, then the height of A is

### Choices

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

a. | 1.5 m | |

b. | 0.3 m | |

c. | 1.8 m | |

d. | 2.8 m |

## Question 30

### Question

MCQ▾Are they in proportion 8: 2 and 4: 16?

### Choices

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

a. | No | |

b. | Yes | |

c. | Sometimes | |

d. | None of the above |

## Question 31

### Question

MCQ▾Ratio symbol is ________ and is read as ________.

### Choices

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

a. | =, equal to | |

b. | : , is to | |

c. | : : , equal to | |

d. | None of the above |

## Question 32

### Question

MCQ▾is

### Choices

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

a. | 75.42 | |

b. | 0.7542 | |

c. | 0.07542 | |

d. | 754.2 |

## Question 33

### Question

MCQ▾For 20: 10: : 10: 5, the mean proportion is

### Choices

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

a. | 10 | |

b. | 100 | |

c. | 5 | |

d. | 20 |

## Question 34

### Question

MCQ▾When a number is reduced by 14, it becomes 30 % of itself. Find the number.

### Choices

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

a. | 70 | |

b. | 20 | |

c. | 30 | |

d. | 60 |

## Question 35

### Question

MCQ▾of a cloth is white, of a cloth is red and remaining 6 meters is painted blue. Find the length of cloth.

### Choices

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

a. | 65 m | |

b. | 80 m | |

c. | 70 m | |

d. | 90 m |

## Question 36

### Question

MCQ▾Difference of 99.99 and 100 is

### Choices

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

a. | 1.10 | |

b. | 0.11 | |

c. | 0.1 | |

d. | 0.01 |

## Question 37

### Question

MCQ▾The present age of A is twice that of B. 10 years from now, age of A will be times of B. Find the present ages of A and B respectively.

### Choices

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

a. | 20,10 | |

b. | 10,20 | |

c. | 20,30 | |

d. | 30,20 |