# Numerical Ability [GATE (Graduate Aptitude Test in Engineering) Aptitude]: Questions 26 - 29 of 103

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## Question 26

Appeared in Year: *2016*

### Question

MCQ▾The binary operation is defined as , where and are any two real numbers. The value of the identity element of this operation, defined as the number such that , for any is

### Choices

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

a. | 1 | |

b. | 0 | |

c. | 2 | |

d. | 10 |

## Question 27

Appeared in Year: *2017*

### Question

MCQ▾students are taking one or more courses out of Chemistry, Physics and Mathematics. Registration records indicate course enrolment as follows: Chemistry , Physics , Mathematics , Chemistry and Physics , Chemistry and Mathematics , and Physics and Mathematics . How many students are taking all subjects?

### Choices

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

a. | 53 | |

b. | 37 | |

c. | 43 | |

d. | 47 |

## Question 28

Appeared in Year: *2021*

### Question

MCQ▾Ms. X came out of a building through its front door to find her shadow due to the morning sun falling to her right side with building to her back. From this, it can be inferred that building is facing ________

### Choices

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

a. | East | |

b. | North | |

c. | West | |

d. | South |

## Question 29

Appeared in Year: *2014*

### Question

MCQ▾A foundry has a fixed daily cost of whenever it operates and a variable cost of , where is the daily production in tonnes. What is the cost of production in per tonne for a daily production of tonnes?

### Choices

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

a. | 1400 | |

b. | 1200 | |

c. | 1300 | |

d. | 1350 |