Simplification (Railway Maths) (751 to 800)

Total Questions: 50

31. The product of two numbers is 40. One of them is 2.50. What is the other number? [RRB ALP 13/08/2018 (Evening)]

Correct Answer: (d) 16
Solution:

Let the other no be x
ATQ,
⇒ 2.50 × x = 40 ⇒ x = 40/2.50 = 16

32. Solve the following: [RRB ALP 13/08/2018 (Evening)]

45 − [ 38 − { 60 ÷ 3 − ( 6 − 9 ÷ 3 ) } ] = ?

Correct Answer: (a) 26
Solution:

45 - [38 - { 60 ÷ 3 - (6 - 9 ÷ 3 ) ÷ 3}]
= 45 - [38 - {20 - (6 - 3 ) ÷ 3}]
= 45 - [38 - {20 - 3 ÷ 3}]
= 45 - [38 - {20 - 1}]
= 45 - [38 - 19] ⇒ 45 - 19 = 26

33. 23 × 31 = 713. How much is 0.0713 ÷ 3.1 ? [RRB ALP 13/08/2018 (Evening)]

Correct Answer: (d) 0.023
Solution:

0.0713 ÷ 3.1 = 0.023

34. If 3/4 of the weight of a brick is 7/8 kg, then 5/7 of the weight of the brick will be: [RRB ALP 14/08/2018 (Morning)]

Correct Answer: (a) 5/6 kg
Solution:

35. A fraction, when taken away from 1/3, gives 1/12. The fraction is: [RRB ALP 14/08/2018 (Morning) ]

Correct Answer: (d) 1/4
Solution:

36. The square of 11111 is: [RRB ALP 14/08/2018 (Afternoon) ]

Correct Answer: (a) 123454321
Solution:

11111² = 123454321

37. Find the answer of given question? [RRB ALP 14/08/2018 (Evening) ]

Correct Answer: (b) - 3
Solution:

38. 25 − 1/2 {5 + 4 − ( 3 + 2 − 1 + 3 )} = ? [RRB ALP 14/08/2018 (Evening)]

Correct Answer: (d) 24
Solution:

39. 4/5 + 4/7 = ? [RRB ALP 14/08/2018 (Evening)]

Correct Answer: (b)
Solution:

40. How much does one need to add to 2/3 to obtain 3/2 ? [RRB ALP 17/08/2018 (Morning)]

Correct Answer: (d) 5/6
Solution:

Let the number be x
ATQ,
⇒ x + 2/3 = 3/2 ⇒ x = 3/2 - 2/3 ⇒ x = 5/6