# Tech Mahindra Placement: Sample Questions 37 - 39 of 42

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## Question 37

Edit

### Write in Short

Short Answer▾Sum of money at compound interest amounts thrice itself in 3 years. In how many years will it take 9 times itself?

### Explanation

- For compound interest,

- We are asked to fin number of years when money will be 9 times the original.

- In 6 years, sum will be 9 times the original amount.

## Question 38

### Question

MCQ▾The price of sugar increases by 20 % , by what % house-wife should reduce the consumption of sugar so that expenditure on sugar can be same as before?

### Choices

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

a. | 15 % |

b. | 16.66 % |

c. | 9 % |

d. | 12 % |

### Answer

b.### Explanation

- If the price of any product gets increased by R % then to reduce the consumption of product so that expenditure does not increase, we need to apply this formula.
- Here, price of sugar gets increased by 20 % . So, house wife should reduce the consumption of sugar so that expenditure on sugar can be same as before by applying,

=

=

= 16.66 %

- House wife should reduce the consumption of sugar by 16.66 % .

## Question 39

### Question

MCQ▾Complete the following series.

________ , ayw, gec, mki, sqo

### Choices

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

a. | lmn |

b. | awx |

c. | usq |

d. | prs |

### Answer

c.### Explanation

- Alphabets in series is: a b c d e f g h i j k l m n o p q r s t u v w x y z
- Alphabets in reverse order is: z y x w v u t s r q p o n m l k j i h g f e d c b a
- Second term of the series is ayw, in which we have taken every alternate letter of alphabets to make a term.
- Same way, third term is gec, in which again alternate letters are making a term.
- Same way, fourth term is mki, in which again alternate letters are making a term.
- Same way, fifth term is sqo, in which again alternate letters are making a term.
- Applying the same analogy, first term will be usq from the reverse alphabetical series.