Missing Number – Railway Reasoning part – 2

Total Questions: 50

41. Find the missing number to complete the following sequence: [RRB NTPC 01/02/2021 (Morning)]

Correct Answer: (a) 205
Solution:

Logic -
3² + 6² = 45 , 1² + 8² = 65
similarly 6² + 13² = 205

42. Find the missing number to complete the following sequence: [RRB NTPC 01/02/2021 (Evening)]

Correct Answer: (c) Q₁₇
Solution:

Logic :- Alphabet + 3 = next alphabet
First Num + Second Num = Third Num
B + 3 = E, E + 3 = H and 3 + 4 = 7
Similarly
K + 3 = N, N + 3 = Q and 8 + 9 = 17
Therefore, ? = Q₁₇

43. Find the missing number to complete the following sequence: [RRB NTPC 01/02/2021 (Evening)]

Correct Answer: (d) 7
Solution:

Logic:- Place value of alphabet + corresponding numbers = 27
(S) 19 + 8 = 27
(W) 23 + 4 = 27
(A) 1 + 26 = 27
(T) 20 + 7 = 27

44. Find the missing number to complete the following sequence: [RRB NTPC 02/02/2021 (Morning)]

Correct Answer: (a) 36
Solution:

Multiplication of number of sides × given number
3 × 3 × 4 = 36

45. Find the missing number to complete the following sequence: [RRB NTPC 02/02/2021 (Morning)]

Correct Answer: (d) 10
Solution:

(8 × 9) ÷ 2 = 36
(7 × 6) ÷ 2 = 21
(5 × 4) ÷ 2 = 10

46. Find the missing number to complete the following sequence: [RRB NTPC 02/02/2021 (Morning)]

Correct Answer: (c) 13
Solution:

9 × 7 − 5 × 3 = 48
6 × 9 − 7 × 3 = 33
8 × 6 − 5 × 7 = 13

47. Find the missing number to complete the following sequence: [RRB NTPC 02/02/2021 (Evening)]

Correct Answer: (d) 18
Solution:

48. Find the missing number to complete the following sequence: [RRB NTPC 02/02/2021 (Evening)]

Correct Answer: (c) 10
Solution:sum of all numbers is equal to 70
Hence, required number is
70 - (32 + 18 + 10) = 10

49. Find the missing number to complete the following sequence: [RRB NTPC 02/02/2021 (Evening)]

Correct Answer: (b) 11 ; 9 ; 20
Solution:

50. Find the missing number to complete the following sequence: [RRB NTPC 02/02/2021 (Evening)]

Correct Answer: (b) 4
Solution: