UGC NET July 2018 Paper 1 Solved Q 21 - 30 | NTA UGC NET Question Paper

21. The next term in the series -1, 5, 15, 29, ? ,.. is :

(1) 36

(2) 47

(3) 59

(4) 63

Answer: (2) 47
-1,(+6) 5,(+10) 15,(+14) 29,(+18) --> 47
Here, increments in numbers  +6, +10, +14, +18 forms an arithmetic progression(AP).

22. The next term in the series ABD, DGK, HMS, MTB, SBL, ? , ... is :

(1) ZKU

(2) ZCA

(3) ZKW

(4) KZU

Answer: (3) ZKW
ABD,(+3,+5,+7) DGK,(+4,+6,+8) HMS,(+5,+7,+9) MTB,(+6,+8,+10) SBL,(+7,+9,+11)--> ZKW 

23. If VARANASI is coded as WCUESGZQ, then the code of KOLKATA will be :

(1) LOQOZEH

(2) HLZEOOQ

(3) ZELHOQO

(4) LQOOFZH

Answer: (4) LQOOFZH
VARANASI(+1,+2,+3,+4...)-> WCUESGZQ KOLKATA(+1,+2,+3,+4...) -->LQOOFZH

24. Introducing Rakesh to her husband a women said, "His brother's father is the only son of my grandfather". The woman is related to Rakesh as :

(1) Aunt

(2) Mother

(3) Sister

(4) Daughter

Answer: (3) Sister

25. Two numbers are in the ratio 2 : 5. If 16 is added to both the numbers, their ratio becomes 1 : 2. The numbers are :

(1) 16, 40

(2) 20, 50

(3) 28, 70

(4) 32, 80

Answer: (4) 32, 80
Let  x : y = 2 : 5
then, (x+16) : (y+16) = 1 : 2
So, y - 2x =16, which satisfied in option

(4) =>80 - (2*32) = 16

26. Superiority of intellect depends upon its power of concentration on one theme in the same way as a concave mirror collects all the rays that strike upon it into one point.

(1) Mathematical

(2) Psychological

(3) Analogical

(4) Deductive

Answer: (3) Analogical
Analogy is a comparison between one thing and another, typically for the purpose of explanation or clarification
Here, To understand Superiority of intellect, the power concentration is compared to the concave mirro example
https://www.vocabulary.com/dictionary/analogical

27. Given below are two premises (A and B). Four conclusions are drawn from them. Select the code that states validity drawn conclusion (s) (taking the premises individually or jointly).
Premises:
(A) Most of the dancers are physically fit.
(B) Most of the singers are dancers.
Conclusions:
(a) Most of the singers are physically fit.
(b) Most of the dancers are singers.
(c) Most of the physically fit persons are dancers.
(d) Most of the physically fit persons are singers.

(1) (a) and (b)

(2) (b) and (c)

(3) (c) and (d)

(4) (d) and (a)

Answer: (2) (b) and (c)

28. Which one among the following is a presupposition in inductive reasoning?

(1) Law of identity

(2) Unchangeability in nature

(3) Harmony in nature

(4) Uniformity of nature

Answer: (4) Uniformity of nature

29. If the proposition 'domestic animals are hardly ferocious' is taken to be false, which of the following proposition/propositions can be claimed to be certainly true?
Select the correct code:
Propositions:
(a) All domestic animals are ferocious.
(b) Most of the domestic animals are ferocious.
(c) No domestic animal is ferocious.
(d) Some domestic animals are non-ferocious.

(1) (a) and (b)

(2) (a) only

(3) (c) and (d)

(4) (b) only

Answer: (1) (a) and (b)

30. Which one of the following statements is not correct in the context of Venn diagram method?

(1) It is a method of testing the validity of arguments.

(2) It represents both the premises of a syllogism in one diagram.

(3) It requires two overlapping circles for the two premises of a standard-form categorical syllogism.

(4) It can be used to represent classes as well as propositions.

Answer: (3) It requires two overlapping circles for the two premises of a standard-form categorical syllogism.
Below link explains answer
Venn diagram-choose the odd man out