Mental Ability, Analytical and Logical Reasoning (UPSC) Part-I

Total Questions: 50

21. Which one of the following satisfies relationship

Dda: aDD:: Rrb:?

(a) DDA
(b) RRR
(c) bRR
(d) BBr

Correct Answer: (c) bRR

Solution:First and third letters have been interchanged. Middle letter becomes capital.

22. A, B, C, D, E and F, not necessarily in that order, are sitting on six chairs regularly placed around a round table. It is observed that A is between D and F, C is opposite to D and D and E are not on neighbouring chairs. [1998]

Which one of the following pairs must be sitting on neighbouring chairs?

(a) A and B
(b) C and E
(c) Band F
(d) A and C

Correct Answer: (b) C and E

Solution:

As it can be seen from the figure, C and E are sitting on the neighbouring chairs.

23. If in a certain code SAND is VDQG and BIRD is ELUG, then what is the code for LOVE? [1998]

(a) PRYG
(b) ORTG
(c) NPUH
(d) ORYH

Correct Answer: (d) ORYH

Solution:

24. In a group of five people, K, L and M are ambitious, M, N, and R are honest, L, M and N are intelligent and K, N and R are industrious. Among these neither industrious nor ambitious person(s) would include [1999]

(a) K alone
(b) L and R
(c) M and N
(d) none of the group

Correct Answer: (d) none of the group

Solution:K - A/ID
N - H/I/ID
L - A/I
R - ID/H
M - A/H/I
Where,
A - Ambitious
H - Honest
1 - Intelligent
ID - Industrious
Here, clearly everyone is either industrious or ambitious.

25. On another planet, the local terminology for earth, water, light, air and sky are 'sky', 'light', 'air', 'water' and 'earth' respectively. If someone is thirsty there, what would he drink? [1999]

(a) Sky
(b) Water
(c) Air
(d) Light

Correct Answer: (d) Light

Solution:

earth → water

water → sky

sky → light

light → air

air → sky

sky → water

water → earth

If someone is thirsty, then he would drink water. Now, water on that planet means light, so he would drink light.

26. In a code language, 'SOLID' is, written as 'WPSLPIMFHA', What does the code' ATEXXQIBVO' refer to? [1999]

If same is applied with ATEXXQIBVO

So code 'ATEXXQIBVO' refers to 'WATER'.

(a) EAGER
(b) WAFER
(c) WAGER
(d) WATER

Correct Answer: (d) WATER

Solution:

If same is applied with ATEXXQIBVO

27. Examine the following relationships among members of a family of six persons A, B, C, D, E and F. [2000]

1. The number of males equals that of females

2. A and E are sons of F.

3. D is the mother of two, one boy and one girl

4. B is the son of A

5. There is only one married couple in the family at present

Which one of the following inferences can be drawn from the above?

(a) A, B and C are all females
(b) A is the husband of D
(c) E and F are children of D
(d) D is the grand daughter of F

Correct Answer: (b) A is the husband of D

Solution:'O' Female, ''→Male, →→Couple,'' Offspring

Since, there is only 1 married couple, so D must be married to A, as D is the mother of two and B is the son of A. Also, as number of males and females are equal, so F must be a female.

28. In a certain code, MARCH is written as OCTEJ, how is RETURN written in that code? [2000]

(a) TFUVSM
(b) QGSTQM
(c) TGVWTP
(d) TGRVSO

Correct Answer: (c) TGVWTP

Solution:Position of each letter of the 1st word has been incremented by two alphabets in the 2nd word.

29. A, B, C, D, E and F not necessarily in that order are sitting in six chairs regularly placed around a round table. It is observed that. [2000]

A is between D and F

C is opposite to D

D and E are not on neighbouring chairs

Which one of the following must be true

(a) A is opposite B
(b) D is opposite E
(c) C and B are neighbours
(d) B and E are neighbours

Correct Answer: (d) B and E are neighbours

Solution:

Fix the position of A and proceed according to the given conditions. There can be two cases as above in the figure. In both B and E are neighbours.

30. Consider the following pictures of dice: [2000]

What is the number opposite to 3?

(a) 1
(b) 4
(c) 5
(d) Data insufficient

Correct Answer: (b) 4

Solution:From figure (i) & (ii). It is clear that 2 is adjacent to 3 and 4 is adjacent to 2, hence 4 must be opposite to 3.

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Mental Ability, Analytical and Logical Reasoning (UPSC) Part-I

21. Which one of the following satisfies relationship

22. A, B, C, D, E and F, not necessarily in that order, are sitting on six chairs regularly placed around a round table. It is observed that A is between D and F, C is opposite to D and D and E are not on neighbouring chairs. [1998]

23. If in a certain code SAND is VDQG and BIRD is ELUG, then what is the code for LOVE? [1998]

24. In a group of five people, K, L and M are ambitious, M, N, and R are honest, L, M and N are intelligent and K, N and R are industrious. Among these neither industrious nor ambitious person(s) would include [1999]

25. On another planet, the local terminology for earth, water, light, air and sky are 'sky', 'light', 'air', 'water' and 'earth' respectively. If someone is thirsty there, what would he drink? [1999]

26. In a code language, 'SOLID' is, written as 'WPSLPIMFHA', What does the code' ATEXXQIBVO' refer to? [1999]

27. Examine the following relationships among members of a family of six persons A, B, C, D, E and F. [2000]

28. In a certain code, MARCH is written as OCTEJ, how is RETURN written in that code? [2000]

29. A, B, C, D, E and F not necessarily in that order are sitting in six chairs regularly placed around a round table. It is observed that. [2000]

30. Consider the following pictures of dice: [2000]

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