GATE Electrical 2020 | GA | Question: 7

Question

Select the next element of the series: $\text{Z, WV , RQP,}$ _____

• A. $\text{LKJI}$
• B. $\text{JIHG}$
• C. $\text{KJIH}$
• D. $\text{NMLK}$

Answer 1

In first place we have one letter, in second place we have two-letters and so on.

Now, we can follow the pattern.

• $Z \overset{-3}{\rightarrow} W \overset{-5}{\rightarrow} R \overset{-7}{\rightarrow} K$
• $V \overset{-5}{\rightarrow} Q \overset{-7}{\rightarrow} J $
• $P \overset{-7}{\rightarrow} I $
• $H$

So, the correct answer is $(C).$

Comments

z -->W -3 SA HOGA NA KI -4 BRO

Answer 2

Ans C.

Sequence Number of Letter 

Z	W, V	R, Q, P
26	23, 22	18, 17, 16

LKJI	JIHG	KJIH	NMLK
12, 11, 10, 9	10, 9, 8, 7	11, 10, 9, 8	14, 13, 12, 11

 

Number of Letters increasing in – 1 – 2 – 3 – (4 letters)

Difference in Letter coding Between terms

First – Second = $26-23=3$ (Y, X, W)

Second – Third = $18-22=4$ (U, T, S, R)

Third – Fourth = $16-x= 5, x=11$  Starting from K

 

Answer 3

For such questions, always have this reference ready; it aids in quickly discerning patterns without resorting to extensive addition and subtraction.

$A, B, C, D, E, F,$

$G, H, I, J, K, L,$

$M, N, O, P, Q, R,$

$S, T, U, V, W, X,$

$Y, Z$

Given sequence: $Z, WV, RQP$

Notice, if you move from $Z$ in reverse until you reach $W$, you will have passed $2$ letters. Now, collect two letters in reverse, including $W$. Thus, you have $WV$. Next, continue in reverse until you reach $R$. You will have passed $3$ letters, so now collect $3$ letters in reverse, including $R$. This gives you $RQP$.

By this point, you should grasp the pattern. Continue in reverse, crossing $4$ letters and collecting $4$ letters, including the starting letter. This results in $KJIH$.

Answer 4

It was more of a pattern if u see.…

 

1. Z (the next two letters were missing) YX
2. WV (next three letters were missing) UTS
3. RQP ( next four letters were missing) ONML
4. KJIH …. and so on…...