Alphanumeric Series – Railway Reasoning (Part- 1)

Total Questions: 50

1. # 9 1 @ 4 * 7 ^ 5 3 # 9 1 < 5  4 @ 3 $ # 2 * 6 ! 4 2 & 9 < 3 6 # 2 % 2 @ 7. [Group - D 17/08/2022 (Afternoon)]

If all the even numbers in the given series are replaced by a number which is both prime and even, then how many such numbers will there be in the resulting series which are immediately preceded by a prime number and immediately followed by a symbol ?

Correct Answer: (d) 4
Solution:

(after replacing all even numbers by a number which is both prime and even i.e. 2 we get,
# 9 1 @ 2 * 7 ^ 5 3 # 9 1 < 5 2 @  3 $ # 2 * 2 ! 2 2 & 9 < 3 2 # 2 % 2 @ 7).
Such numbers in the resulting series which are immediately preceded by a prime number and immediately followed by a symbol.= . (5 3 #), (5 2 @), (2 2 &) and (3 2 #).
Total such numbers = 4

2. L @ S * E ^ B U # W I < E M @ O $ # B * H ! A & L < O [ Group - D 17/08/2022 (Evening)]

If we replace each of the vowels with any consonant and similarly if we replace each of the consonants in the original series with any vowel, then how many consonants will be immediately followed by a symbol in the resultant series thus formed?

Correct Answer: (a) 5
Solution:Given series:
L @ S * E ^ B U # W I < E M @ O $ # B * H ! A & L < O
Since consonant will come in place of a vowel, so we have to look for vowels followed by a symbol in the original series
So, total consonants immediately followed by a symbol in the resultant series = 5
( E^ ), ( U# ), ( I< ), ( O$ ) and ( A& )

3. (Left) GC68 T 7D4 6K 2RY 35E S A4TY78GT (Right) [Group - D 25/08/2022 (Afternoon)]

If all the numbers are dropped from the series, how many letters are there in the English alphabetical order between the letter that is fourth from the right end and the letter that is sixth from the left end of the given series?

Correct Answer: (c) One
Solution:

(Left) GC68 T 7D4 6K 2RY 35E
S A4TY78GT (Right)
If all the numbers are dropped, we get GC T D K RY E S ATYGT
Now, 4th letter from right end = T
And, 6th letter from left end = R
Therefore, there is only one letter between T and R ie., S

4. The following question is based on the given seven, 3-digit numbers. [Group - D 01/09/2022 (Morning)]

(Left) 621, 443, 227, 316, 625, 118, 231 (Right) (For example, 456: 6-digit in unit's place, 5-digit in ten's place, 4-digit in hundred's place)
 NOTE - All operations to be done from left to right.
If 5 is added to the digit in ten's place of each number and 1 is subtracted from the digit in unit's place of each number, which digit will be repeated the greatest number of times in the transformed number series thus formed?

Correct Answer: (c) 6
Solution:

621, 443, 227, 316, 625, 118, 231 (Right)
After adding 5 to the ten’s place and subtracting 1 from unit digit of each number we get,
(Left) 6 70, 492, 27 6 , 3 6 5, 6 74, 1 6 7, 280 (Right)
6 is repeated the greatest number of times.

5. If each of the digits in the number 417593286 is arranged in ascending order from left to right, the position of how many digits will remain unchanged as compared to that in the original number? [Group - D 02/09/2022 (Evening)]

Correct Answer: (c) 1
Solution:

Given number: 417593286
By arranging in ascending order as per question we get ,
1234567 8 9
From the above arrangement we can say that 8 is the only digit, whose position remains same as compared to the original number.

6. 74&@34%@ $4 @ 34%4$5*@4345*3 [Group - D 05/09/2022 (Morning)]

How many 4s are there that are immediately followed by a symbol?

Correct Answer: (c) Five
Solution:

Given series :
7 4 & @ 3 4 % @ $ 4 @ 3 4 % 4 $ 5 * @ 4 3 4 5 * 3 In the given series there are 5 such 4s (4 &, 4 %, 4 @, 4 %, 4 $ ) which are immediately followed by a symbol.

7. If all the numbers given below are arranged in ascending order, the position of how many numbers will remain unchanged? [Group - D 08/09/2022 (Evening)]

246, 247, 548, 845, 346, 578, 145

Correct Answer: (c) 1
Solution:

Given , 246, 247, 548, 845, 346, 578, 145 By arranging in ascending order as per question
we get,
145, 246, 247, 346, 548, 578 , 845
From the above arrangement we can say that 578 is the only number which remains unchanged.

8. From the numbers 583, 459, 687, 754 and 853 , which of the following will be the lowest number, if in each number, all the 8s and 5s are replaced with 2 and 1, respectively? [Group - D 08/09/2022 (Evening)]

Correct Answer: (c) 583
Solution:

Given , 583, 459, 687, 754 , 853 By replacing of all the number’s 8 and 5 with 2 and 1
we get, 123, 419, 627, 714, 213
So from above we can see that 583 ( coded as 123 ) is the lowest number amongst all.

9. (LEFT) 2 8 3 6 0 8 1 5 3 7 3 4 9 6 2 4 3 2 5 6 4 0 7 (RIGHT) [Group - D 26/09/2022 (Morning)]

Based on the arrangement given. Three of the following four groups of numbers (given in options) are alike in a certain way and so form a group. Which option does NOT belong to that group?

Correct Answer: (b) 462
Solution:

(LEFT) 2 8 3 6 0 8 1 5 3 7 3 4 9 6 2 4 3 2 5 6 4 0 7 (RIGHT)
Rule : digits are placed alternately.
But 462 does not follow the rule.

10. (Left) 6 $ + S r 3 B 6 A * ? # c < Z R & d & G ! q (Right) [NTPC CBT II Level 4 (10/05/2022) Shift 1]

If the given sequence is written in the reverse order, then which element will be to the left of the element from the 5 ᵗʰ 8ᵗʰ right end?

Correct Answer: (b) c
Solution:

(Left) 6 $ + S r 3 B 6 A * ? # c < Z R & d &G!q (Right)
If this is written in reverse order then simply left and right interchanges as
(Right) 6 $ + S r 3 B 6 A * ? # c < Z R & d & G ! q (Left)
Required element is c .