Reasoning Solved Paper

Reasoning Solved Paper by Santosh Sharma (GS COSMOS CAREERS)

Q. 1. What terms will fill the blank spaces?
Z, X, V, T, R, (…….. ), (……… )
(a) 0, K
(b) N, M
(c) K, S
(d) M, N
(e) P, N
Ans. Clearly, the given series consists of alternate letters in a reverse order. So, the missing terms would be P and N. Hence, the answer is (e).

Ex. 2. Which term comes next in the sequence: nd iy dt yo tj ?
(a) mp
(b) nq
(c) of
(d) oe
(e) me
Ans. Clearly, the first and second letters of each term are moved five steps backward to obtain the corresponding letters of the next term.
Hence, the answer is (d).

Ex. 3. What will be the next term in : BDF, CFI, DHL, ?
(a) CJM
(b) ElM
(c) EJO
(d) EMI
ANs. Clearly, the first, second and third letters of each term are respectively moved one, two and three steps forward to obtain the corresponding letters of the next
term. So, the missing term is EJO. Hence, the answer is (c).

Ex. 4. Which term comes next in the series: YEB, WFD, UHG, SKI ?
(a) QOL
(b) QGL
(c) TOL
(d) QNL
Ans. Clearly, the first letter of each term is moved two steps backward to obtain the first letter of the next term. So, the first letter of the missing term will be Q. The second letter of the first, second, third, fourth terms are respectively moved one, two, three and four steps forward to obtain the corresponding letter of the subsequent term. So, the second letter in the missing term will be O. The third letter is alternately moved two and three steps forward to obtain the corresponding letter of the subsequent term. 80, the third letter in the missingterm will be L. Thus, the missing term is QOL. Hence, the answer is (a).

Ex. 5. Which term will replace the question mark in the series:
ABD, DGK, HM8, MTB, 8BL, ? -
(a) ZKW
(b) ZKD
(c) ZAB
(d) XKW
Ans. Clearly, the first letters of the first, second, third, fourth and fifth terms are moved three, four, five, six and seven steps forward respectively to obtain the first letter of the successive terms. The second letters of the first, second, third, fourth and fifth terms are moved five, six, seven, eight and nine steps forward respectively to obtain the second letter of the successive terms. The third letters of the first, second, third, fourth and fifth terms are moved seven, eight, nine, ten and eleven steps forward respectively to obtain the third letter of the successive terms. Thus, the missing term would be ZKW. Hence, the answer is (a).

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Ex. 6. Choose the term which will continue the following series:
P 3 C, R 5 F, T 8 I, V 12 L, ?
(a)Y170
(b)X17M
(c)X170
(d)X160
Ans. Clearly, the first letters of the terms are alternate.The sequence followed by the numbers is + 2, + 3, + 4, … . The last letter of each term is three steps ahead of the last letter of the preceding term. Thus, the next term would be X 17 O. Hence, the answer is (c)

PRACTICE QUESTIONS

1. What will be the 12^th letter to the right of 10^th from the left side?       

    a. V   b. T   c. U   d. W

2. What will be the 9^th letter to the left of 16^th from the right side?      

    a. D b. C c. B d. A

3. What will be the 19^th letter to the right of 3^rd from the left side?

   a. U  b. T  c. W d. V

4. What will be the 11^th letter to the left of 13^th from the right side?        

    a. C  b. D  c. B  d. E

5. What will be the 18^th letter from the left if the first half of the alphabet is reversed?

a.    R  b. V c. I  d. Q

6. What will be the 13^th letter from the right side if the first half of the normal alphabet is reversed?    

a.    A  b. Z  c. N  d. M

7. What will be the 16^th letter from the left side if the second half is written in reverse order?   

a. C   b. X   c. L   d. None of these

8.  What will be the 21st letter from the right side if the first half of the alphabet is reversed?    

a.    H   b. R   c. F   d. None of these

 9. What will be the 16^th letter to the right of the 8^th letter from the left if the entire alphabet is written in reverse order?        

     a. C  b. B  c. X  d. None of these

10. Which alphabet will be mid-way between the 7^th and the 11^th letters counting from the left end of a normal alphabet?

    a. H   b. R   c. D   d. I

11. Which alphabet will be mid-way between the 17^th and the 5^th letters counting from the right end of a normal alphabet?    

a.    P  b. J c. Q   d. K

12. Which alphabet will be mid-way between the 8^th and the 11^th letters counting from the left end of a normal alphabet?

a.    S  b. Q c. P  d. indeterminate answer

 

13. Which letter will be 2 positions ahead of the letter which is mid-way between the 7^th letter and the 19^th letter from the right end?       

a.    P b. O  c. Q   d. M

 14. Which letter will be three positions left of the mid-point between the 5^th and the 7^th letters from the right side?          

     a. C     b. K  c. P   d. R

 15. Which letter will be the 8^th letter to the right of the 11^th letter from the left side if the first and the second halves are reversed separately?     

   a. None of these b. U  c. X   d. S

16. Which alphabet, if counting is done from both the left and the right sides, will be mid-way between the 12^th from the left side and the 11^th from the right side?

a. W b. D     c. N   d. M

17. If MDX: NWC:: KTR: ?        

a.    PGI   b.  LGI c. PHI d. OHJ

18. JHFC: BGGK:: PMRO: ?

a.    ORMQ     b. None of these   c. NSLQ    d. MSLQ

19. If ADCE: 259161, RTOPQ:: ?          

a.    289256225400324   b. 324289256225400  c. 256225225400324  d. None of these

20. If EVS: DXP, LRT: ?       

    a. KTQ b. KPQ     c. MUW   d. None of these

Keys and Explanations

1.   A.

10+12= 22^nd from left.

1. C

16+9= 25^th from right i.e. 2^nd from left

2. D

22^nd from left. Use EJOTY.

3. A

24^th from right i.e. 3d from left

4. A

The reversal of the first half will not impact our answer as it falls in the second half.

5. C

The reversal of the first half will not impact our answer as it falls in the second half.

6. B

A-N gives us 13 letters from left. The rest have to be from right i.e. 3^rd from right i.e. 24^th from left is the answer.

7. A

The reversal of the first half will impact our answer as it falls in the first half. Z-N gives us the first 13 letters. The rest eight have to come from A….M. So counting with EJOTY, the 8^th from left is H.

8. C

In a nutshell, after reversal, we need to count the 3^rd letter from left i.e. X.

9. D

Averaging 11 and 7 gives us 9 i.e. I.

10.  A

17^th and 5^th from right correspond to 10^th and 22^nd from left. Averaging them yields 16 i.e. P.

11.  D

11^th and 8^th from right correspond to 16^th and 19^th from left. Averaging them yields 17.5 i.e. non-existent letter.

12.  A

7^th and 19^th from right correspond to 20^th and 8^th from left. Averaging them yields 14 i.e. N. Two places ahead of N is P.

13.  D

5^th and 7^th from right correspond to 22^nd and 20^th from left. Averaging them yields 21 i.e. U, which has R three places to its left.

14.  B

We need to find the 21^st letter from the left side.

15.  C

Averaging 12 and 16 yields 14.

16.  A

M D X : N   W  C    :: K     T    R    :   P     G    I

14 4 25  14   4    25     11    20   18      11    20   18   

 

     From left     From right   From left      From right

17.  C

    BECOMES (REVERSE ORDER)   BECOMES (REVERSE ORDER)

J   H    F   C : B   G   G  K    :: P    M   R   O : N  S  L  Q

              +1 -1  +1 -1           +1  -1  +1   -1

    Becomes (REVERSE ORDER) BECOMES (REVERSE ORDER)

18.     ^A

^{Squaring respective alphabetical positions and putting them in a reverse order.}

A   D   C   E: 25  9  16  1         :: R    T O     P    Q : 289  256  225  400 324

                     1²  4²  3² 5²                                                     18²  20²   15²  16²  17²    

19.  A

E   V    S : D  X   P     ::    L   R    T:      K   T   Q      

5   22   19 : 4  24 16     ::   12   18   20     11  20  17

     

-1   +2  -3 -1   +2   -3

         Becomes   Becomes