Arithmetic Reasoning – Railway Reasoning

Total Questions: 52

41. If each of the digits in the number 8356427 is arranged in ascending order from left to right, then what will be the sum of the digits that are second from the left and second from the right in the new number thus formed? [Group - D 20/09/2022 (Afternoon)]

Correct Answer: (c) 10
Solution:Given number = 8356427
After arranging in ascending order = 2345678
Second from the left = 3 and second
from the right = 7
Sum = 3 + 7 = 10

42. This question is based on the five, three-digit numbers given below. [Group - D 20/09/2022 (Afternoon)]

(Left) 438 645 327 153 276 (Right)
(Example: 697-first digit = 6, second digit = 9, third digit = 7)
(NOTE: All operations to be done from left to right)
If 3 is added to the first digit of every number, in how many numbers will the first digit be exactly divisible by 2?

Correct Answer: (d) Two
Solution:

(Left) 438 645 327 153 276 (Right)
As per the instructions,
(Left) 738 945 627 453 576 (Right)
There are only two numbers 627 and 453 whose first digit is divisible by 2.

43. If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 6513742678, how many digits will appear more than once in the new number thus formed? [Group - D 22/09/2022 (Evening)]

Correct Answer: (c) Four
Solution:

Given number = 6513742678 According to the given instruction after adding 1 to the odd digit and subtracting 2 from the even digit
New number = 4624820486
The digits 2 , 4 ,6, 8 have appeared more than once.

44. If 2 is multiplied to each even digit and 2 is added to each odd digit in the number 2434251, what will be the sum of the digits which will appear more than once in the new number thus formed? [Group - D 27/09/2022 (Afternoon)]

Correct Answer: (a) 12
Solution:

Number = 2434251
If 2 is multiplied to each even digit and 2 is added to each odd digit, then, Number = 4858473
Number which are appear more than once = 4 and 8
Sum of digits = 4 + 8 = 12

45. In the number 482818259, if 1 is added to all the digits placed at the even places starting from left and 1 is subtracted from the digits placed at the odd places starting from left, what will be the sum of the last 4 digits ? [Group - D 27/09/2022 (Afternoon)]

(Example - 697- First digit = 6, second digit=9 and third digit = 7)
NOTE - All operations to be done from left to right.

Correct Answer: (a) 24
Solution:

Given number : 482818259 As per the instruction,
1 is added to even places and 1 is subtracted from odd places from left to right.
New number : 391909168
Sum of the last four digits = 9 + 1 + 6 + 8 = 24

46. If 1 is added to each even digit and 2 is subtracted from each odd digit in the number 38572352, what will be the sum of the digits which are second from the left and fourth from the right in the number thus formed? [Group - D 27/09/2022 (Evening)]

Correct Answer: (d) 12
Solution:

Given number : 38572352
As per the instruction given,
+ 1 to the even digits and - 2 from each odd digits
New number = 19353133
Second from the left = 9 and fourth from the right = 3
Sum of the digits = 9 + 3 = 12

47. If 1 is added to each digit of the number 870548362, what will be the sum of the fourth, fifth and sixth digit when counted from left? [Group - D 29/09/2022 (Afternoon)]

Correct Answer: (c) 20
Solution:

Number = 870548362
If 1 is added to each digit, then,
Number = 981659473
Sum of the fourth, fifth and sixth = 6 + 5 + 9 = 20

48. This question is based on the five three-digit numbers given below. [Group - D 30/09/2022 (Morning)]

423 875 652 246 168 (Example - 697 - First digit = 6, second digit = 9 and third digit = 7) What will be the resultant, if third digit of the second greatest number is added to the second digit of the smallest number?

Correct Answer: (b) 8
Solution:

Second greatest number = 652
Third digit of the second greatest number = 2
Smallest number = 168
Second digit of the smallest number = 6
Required sum = 2 + 6 = 8

49. This question is based on the five, three-digit numbers given below. [Group - D 06/10/2022 (Morning)]

(Left) 567 243 186 689 427 (Right)
(Example- 123 - First digit = 1, second digit = 2 and third digit = 3)
NOTE - All operations to be done from left to right.
What will be the resultant if the first digit of the second greatest number is added to the third digit of the smallest number?

Correct Answer: (b) 11
Solution:

According to question,
the second greatest number = 567
the smallest number = 186
first digit of the second greatest number = 5
third digit of the smallest number = 6
Required sum = 5 + 6 = 11

50. This question is based on the five three-digit numbers given below. [Group - D 06/10/2022 (Evening)]

(Example-697 - First digit = 6, second digit = 9 and third digit = 7)
If 2 is added to the second digit of every number, in how many numbers thus formed will the second digit be exactly divisible by the third digit?

Correct Answer: (b) Three
Solution:

573 136 357 442 814 According to the question,
If 2 is added to the second digit of every numbers, then
Numbers = 593, 156, 377, 462, 834 So, there are 3 numbers whose 2nd digit is divisible by the 3rd digit.