Simplification (Railway Maths) (51 to 100)

Total Questions: 50

1. Find the value of (0.00314) (0.0393) (0.0001)? [NTPC CBT - I 01/04/2021 (Evening) ]

Correct Answer: (d) (0.314)(0.00393)(0.00001)
Solution:

2. The non-terminating repeating decimal among the following fractions is: [NTPC CBT - I 07/04/2021 (Morning) ]

Correct Answer: (d) 100/11
Solution:

110/11 is non - terminating repeating decimal number.
Note :- A non-terminating, non-repeating decimal is a decimal number that continues endlessly, with no group of digits repeating endlessly. Decimals of this type cannot be represented as fractions, and as a result are irrational numbers. Pi is a non- terminating, non-repeating decimal.

3. Which of the following rational numbers have a non-terminating decimal expansion? [NTPC CBT - I 07/04/2021 (Evening) ]

Correct Answer: (c) 19 / (2³5²7⁵)
Solution:

For non terminating decimals the denominator should have more factors except 2 and 5.

4. Select the number that can replace both the instances of ‘*’ in the following equation to make it correct. (*/21) x (*/189) = 1? [NTPC CBT - I 07/04/2021 (Evening) ]

Correct Answer: (a) 63
Solution:

5. If 1.5X = 0.05Y, then the value of y - x/ y + x is closed to: [NTPC CBT-I 08/04/2021 (Evening)]

Correct Answer: (c) 0.935
Solution:

6. The difference between 1/3 and 1/4 of a number is equal to its square root. Find the number. [RRB JE 23/05/2019 (Evening) ]

Correct Answer: (d) 144
Solution:

7. Simplify the equation? [RRB JE 24/05/2019 (Evening) ]

Correct Answer: (b) 9/10
Solution:

8. If two-thirds of one quarter of a number is 32, then find the number. [RRB JE 26/06/2019 (Evening) ]

Correct Answer: (d) 192
Solution:

9. A worker has to cut as many pieces as possible of length 5.25 m from a 50 m long steel rod. What part of this whole rod will be left (find in decimal fraction)? [ALP Tier II 23/01/2019 (Afternoon) ]

Correct Answer: (a) 0.02
Solution:

10. The sum of two fractions is 5/6. One of them is 3/4. What is the other fraction? [RRB ALP Tier - I 10/08/2018 (Morning) ]

Correct Answer: (d) 1/12
Solution: