98 Alphabet & Number Series (Reasoning) questions asked in RRB JE previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.
Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) 3 & ^ 5 7 # 9 % 8 * 4 < 1 $ 2 @ * 6 (Right)
How many such symbols are there which are immediately preceded by a number and also immediately followed by another number?
Refer to the following number, symbol series and answer the question. Counting to be done from left to right only.
(Left) * 5 2 # # 2 2 7 & % 2 $ & 1 3 $ % $ 5 4 $ $ (Right)
How many such numbers are there each of which is immediately preceded by a number and also immediately followed by a number?
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
HKN 7, CFI 13, XAD 19, SVY 25, NQT 31, ?
Refer to the given number, symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) $ 7 & 4 2 & % 4 6 @ 8 Ω 9 # 6 * £ 5 = 2 (Right)
How many such symbols are there each of which is immediately preceded by an odd number and immediately followed by an even number?
Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) 5 # * 7 9 % 2 & 1 > 6 @ 3 ^ 4 $ > 8 (Right)
How many such number are there which are immediately preceded by a number and also immediately followed by another number?
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
JCF25, KDG34, LEH43, MFI52, ?
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
FIS38, RUE70, DGQ102, PSC134, ?
Select the option in which the numbers share the same relationship as that shared by the given pairs of numbers.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) 96, 12
184, 23
Select the option in which the numbers share the same relationship as that shared by the given pairs of numbers.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) 185, 113
170, 98
Refer to the given number, symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) 6 # 1 * 8 & 7 & 5 4 Ω 3 % 9 6 @ 2 $ 9 £ 3 (Right)
How many such symbols are there each of which is immediately preceded by an odd number but NOT immediately followed by an even number?
AFour
BTwo
COne
DThree
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Correct answer: (C) One
Explanation
Official answer key: (3) One
Correct answer should be (4) Three. Symbols immediately preceded by an odd number are * (1 * 8), & (7 & 5), % (3 % 9) and £ (9 £ 3). Only * is followed by an even number, so three symbols (&, %, £) satisfy the condition.
Scoring follows the official key.
Refer to the following number and symbol series and answer the question that follows. (Counting to be done from left to right only.)
(Left) 2 @ 4 + = 3 1 # 3 @ $ 9 8 * 9 4 2 8 7 6 5 (Right)
How many such symbols are there, each of which is immediately preceded by and also immediately followed by a number?
When a metal and sulphuric acid react with each other, metal displaces hydrogen, which is higher in the reactivity series. Identify the metal for which the bubbling of hydrogen gas will be the fastest.
Refer to the following number, symbol series and answer the question. Counting to be done from left to right only.
(Left) 3 8 9 5 £ 6 3 @ 3 % @ 7 * 1 # 2 6 9 2 7 & £ (Right)
How many such symbols are there each of which is immediately preceded by a number and also immediately followed by a number?
Which of the following is NOT a homologous series?
AC₂H₄ , C₂H₆ , C₃H₆ , C₄H₈
BC₂H₂ , C₂H₄ , C₃H₆ , C₄H₈
CCH₄ , C₂H₆ , C₃H₈ , C₄H₁₀
DC₃H₇OH , C₄H₉OH , C₅H₁₁OH_, C₆H₁₁OH
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Correct answer: (A) C₂H₄ , C₂H₆ , C₃H₆ , C₄H₈
Explanation
Official answer key: (1) C₂H₄ , C₂H₆ , C₃H₆ , C₄H₈
This question is flawed: option 2 (C₂H₂ is an alkyne, the rest are alkenes) and option 4 (C₆H₁₁OH should be C₆H₁₃OH) are also not homologous series. Option 1 is clearly not one: C₂H₄, C₃H₆, C₄H₈ are alkenes but C₂H₆ is an alkane, and C₂H₆ does not differ from C₂H₄ by CH₂.
Scoring follows the official key.
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
NTZ 14, KQW 23, HNT 32, EKQ 41, BHN 50, ?
Refer to the following number, symbol series and answer the question. Counting to be done from left to right only.
(Left) € $ 7 1 5 * 9 % 2 £ 5 $ 6 £ € 8 8 4 6 £ % 8 (Right)
How many such symbols are there each of which is immediately preceded by a number and also immediately followed by a number?
Select the term from among the given options that can replace the question mark (?) in the following series.
PKI 23, MHF 31, JEC 47, GBZ 79, DYW 143, ?
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
QTW 13, MPS 19, ILO 25, EHK 31, ADG 37, ?
Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) 7 % > 9 2 & 4 < 3 # 8 $ 5 * 6 ^ # 1 (Right)
If all the symbols are dropped from the series, which of the following will be third from the left?
Select the option in which the numbers share the same relationship as that shared by the given pairs of numbers.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) 18, 111
13, 81
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
OHA MFY KDW IBU ?
ASGZ
BGZS
CSZG
DGSZ
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Correct answer: (B) GZS
How to use these RRB JE Reasoning questions
Every question here was asked in a real RRB JE paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full RRB JE papers as timed tests to check your speed under exam conditions.