Reasoning Questions For KVS Exam: 8th December 2018(Solutions)

The reasoning is the most scoring section in any competitive exam. It also develops or nourishes our critical thinking skills as compared to other subjects. In DSSSB,KVS Exam, As a student to score well in this part, you have to start your preparation now because there is negative marking as well. The more you have prepared, the better you score.
Q1. Introducing Rajesh, Neha said, his brother’s father is the only son of my grandfather. How is Neha related to Rajesh?
(a) Mother
(b) Daughter
(c) Sister
(d) Niece
Q2. Ram’s age was square of a number last year and it will be cube of a number next year. How long must he wait before his age is again the cube of a number?
(a) 38 years 
(b) 10 years
(c) 39 years
(d) 64 years
Q3. After a get-together, every person present shakes the hand of every other person. If there were 105 hand shakes in all, how many persons were present in the party?
(a) 15
(b) 14
(c) 13
(d) 16
Q4. In a queue, I am the last person, while my friend is seventh from the front. If the person exactly between me and my friend is on the 23rd position from the front, what is my position in the queue?
(a) 38
(b) 37
(c) 36
(d) 39
Q5. A cube is to be coloured in such a way as to avoid the same colour on adjacent surfaces. What is the minimum number of colours you will require?
(a) Six
(b) Four
(c) Three
(d) Nine
Q6. In a certain code THRIVES is written as SIUHRDU. How is SOULFUL written in that code?
(a) VPTKKTE
(b) VPTKETK
(c) TPVKKTE
(d) TNRKMVG
Q7. Mohan walked 30 metres towards South, took a left turn and walked 15 metres. He then took a right turn and walked 20 metres. He again took a right turn and walked 15 metres. How far is he from the starting point?
(a) 95 metres
(b) 50 metres
(c) 70 metres
(d) None of these
Q8. What should come next in the following letter series?
P Q R S T A B C D E P Q R S A B C D E P Q R S A B C D P Q
(a) R
(b) T
(c) A
(d) B
Q9. In a certain code language, ‘how can you go’ is written as ‘ja da ka pa’, ‘can you come here’ is written as ‘na ka sa ja’ and ‘come and go’ is written as ‘ra pa sa’. How is ‘here’ written in that code language?
(a) ja
(b) na
(c) pa
(d) None of these
Q10. In a row of forty children, R is eleventh from the right end and there are fifteen children between R and M. What is M’s position from the left end of the row?
(a) Fourteenth
(b) Fifteenth
(c) Thirteenth
(d) None of these
Solutions
S1. Ans.(c)
Sol. Only son of Neha’s grandfather means father of Neha. Neha’s father is the father of Rajesh’s brother. Therefore, Neha is the sister of Rajesh.
S2. Ans.(a)
Sol. According to question
(x – 1) = Square number
(x + 1) Cube number
Take, x = 26
26 – 1 = 25 = (5)²
26 + 1 = 27 = (3)³
Next Cube Number = 4 × 4 × 4 = 64
So, Ram has to wait for 64 – 26 = 38 years.
S3. Ans.(a)
S4. Ans.(d)
S5. Ans.(c)
Sol. A cube has six surfaces.
Every surface has one opposite surface.
So, three colours will be required.
S6. Ans.(a)
S7. Ans.(b)
Sol.
Required distance = AE
= AB + BE
= (30 + 20) metres
= 50 metres
S8. Ans.(a)
Sol. 
S10. Ans.(a)





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