Simplification (Railway Maths) (751 to 800)

Total Questions: 50

21. If A = (−14 + 4) and B = 4 − 14, then AB = ? [RRB ALP 10/08/2018 (Afternoon)]

Correct Answer: (b) 100
Solution:

A = ( - 14 + 4) = -10 and B = 4 - 14 = - 10
AB = - 10 × (-10) = 100

22. Find the answer of given question? [RRB ALP 10/08/2018 (Afternoon) ]

Correct Answer: (b)
Solution:

23. How many kilometers are there in one meter? [RRB ALP 10/08/2018 (Evening)]

Correct Answer: (b) 0.001
Solution:

Since, 1000 meter = 1 km
Then, 1 meter = 1/1000 = 0.001 km

24. Given 17 × 29 = 493, then 170 × 0.029 = ? [RRB ALP 10/08/2018 (Evening)]

Correct Answer: (a) 4.93
Solution:

170 x 0.029 = 4.93

25. The square root of 27225 is: [RRB ALP 10/08/2018 (Evening) ]

Correct Answer: (b) 165
Solution:

26. Which of the following will give a terminating decimal ? [RRB ALP 10/08/2018 (Evening) ]

Correct Answer: (d) 9/36
Solution:Clearly, we can see that 9/36 will give a terminating decimal.

27. Solve the following. [RRB ALP 10/08/2018 (Evening) ]

Correct Answer: (d) 22
Solution:

28. The square root of 5329 is . [RRB ALP 13/08/2018 (Morning) ]

Correct Answer: (d) 73
Solution:

29. The product of two numbers is 0.324. One of the numbers is 1.2. What is the other number? [RRB ALP 13/08/2018 (Afternoon) ]

Correct Answer: (d) 0.27
Solution:

Let the other number be = x
ATQ,
x × 1.2 = 0.324 ⇒ x = 0.324 / 1.2 = 0.27

30. Find the answer of given question? [RRB ALP 13/08/2018 (Afternoon) ]

Correct Answer: (c)
Solution:

Reciprocal of 13/5 = 5/13