# Aptitude [Tech Mahindra Placement]: Sample Questions 5 - 7 of 42

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## Question 5

Aptitude

### Question

MCQ▾

Complete the following series.

1, 2, 3, 5,7, 11, ________

Choice (4)

a.

9

b.

13

c.

12

d.

15

d.

### Explanation

• First term of the series is 1.
• Second term of the series is 2, i.e.. 1 + 1 = 2
• Third term of the series is 3, i.e.. 2 + 1 = 3
• Fourth term of the series is 5, i.e.. 3 + 2 = 5
• Fifth term of the series is 7, i.e.. 5 + 2 = 7
• Sixth term of the series is 11, i.e.. 7 + 4 = 11
• Here, terms are in increasing difference of 1, 1, 2, 2, 4,4, 8, … .
• So, next term will be .

## Question 6

Aptitude

### Question

MCQ▾

Complete the following series.

ay, bz, cw, dx, ________

Choice (4)

a.

ev

b.

fv

c.

gu

d.

eu

d.

### Explanation

• Alphabets in series is: abcdefghijklmnopqrstuvwxyz
• Alphabets in reverse order is: zyxwvutsrqponmlkjihgfedcba
• First term of the series is ay.
• Second term of the series is bz.
• Third term of the series is cw.
• Fourth term of the series is dx.
• Following the same analogy, fifth term will be eu.

## Question 7

Aptitude
Edit

### Write in Short

Fill the missing term in the following sequence.

192,221, — 285,320

### Explanation

• First term of the series is 192. Square of 14 is 196 and subtracting 4 from it, we will get 192, i.e..
• Second term of the series is 221. Square of 15 is 225 and subtracting 4 from it, we will get 221, i.e..
• Third term of the series needs to be find out.
• Fourth term of the series is 285. Square of 17 is 289 and subtracting 4 from it, we will get 285, i.e..
• Fifth term of the series is 320. Square of 18 is 324 and subtracting 4 from it, we will get 320, i.e..
• Following the same pattern, we can find the third term.
• Third term should be square of 16 minus 4, i.e..
• Missing term of the series is 252.

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