** Logical Reasoning – Solved Problems
1. Find the missing number in the series.
7, 10, 8, 11, 9, 12, ?.
Answer: 10
Explanation:
In the first pattern, 3 is added; in the second, 2 is subtracted.
i.e, 7 + 3 = 10
10 – 2 = 8
8 + 3 = 11
11 – 2 = 9
9 + 3 = 12
12 – 2 = 10
So the missing number is 10.**

2. In a certain code ‘INACTIVE’ is written as VITCANIE. How is ‘COMPUTER’ written in that code?

Answer: ETUPMOCR

Explanation:

There are 8 letters in the word.

In the given code the fourth and the eighth letters from left have been left intact.

The first letter exchanges position with the seventh letter, the second letter with the sixth letter and the third with the fifth letter.

3. In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.

h __ eg __ fegh __ eghfe __

Answer: f h f g

Explanation:

The sequence is hfeg hfeg hfeg hfeg.

4. Choose the number pair/group which is different from others?

A. 13 – 31

B. 45 – 54

C. 16 – 61

D. 71 – 88

Answer: A. 71 – 88

Explanation:

In all other pairs, the second number is obtained by interchanging the digits of the first.

5. A is B’s sister;

C is B’s mother;

D is C’s father;

E is D’s mother;

Then, how is A related to D ?

A. Grandmother

B. Grandfather

C. Daughter

D. Grand daughter

Answer: D. Grand daughter

Explanation:

A is the sister of B and B is the daughter of C.

So, A is the daughter of C.

Also, D is the father of C.

So, A is the grand daughter of D.

6. Following question is based on the five three- digit numbers given below:

518, 849, 365, 783, 291

If the positions of first and third digits in each number are inter changed, which of the following will be the second digit of third highest number?

Answer: 6

Explanation:

518 = 815;

849 = 948;

365 = 563;

783 = 387;

291 = 192.

Third highest number = 563.