Maths Practice Question and Answer

Q:

A train moves at a speed of 35 km/h for the first 2 hours and at a speed of 50 km/h for the next 4 hours. Find the average speed of the train during the entire journey.

930 0

  • 1
    47 km/h
    Correct
    Wrong
  • 2
    50 km/h
    Correct
    Wrong
  • 3
    45 km/h
    Correct
    Wrong
  • 4
    35 km/h
    Correct
    Wrong
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Answer : 3. "45 km/h"

Q:

A number consists of two digits. If the number formed by interchanging the digits is added to the original number, the resulting number (i.e. the sum) must be divisible by

930 0

  • 1
    11
    Correct
    Wrong
  • 2
    9
    Correct
    Wrong
  • 3
    5
    Correct
    Wrong
  • 4
    3
    Correct
    Wrong
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Answer : 1. "11"
Explanation :

Let the number be 10x + y

After interchanging the digits,

the number obtained = 10y + x

According to the question,

Resulting number

= 10x + y + 10y + x

= 11x + 11y

= 11 (x + y)

which is exactly divisible by 11.

Q:

A travels 25% faster than B. They started their journey from a point P to another point Q and reach at the same time on point Q. Distance between P and Q is 85 km. On the way, however, A lost about 20 minutes while stopping for petrol. What was the speed of B?

930 0

  • 1
    51 km/hr
    Correct
    Wrong
  • 2
    50 km/hr
    Correct
    Wrong
  • 3
    45 km/hr
    Correct
    Wrong
  • 4
    75 km/hr
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 1. "51 km/hr"

Q:

If $$ {(x^{3})^{3} × x^{5}\over{x^{4}}}=x^{n}$$ then find the value of n.

930 0

  • 1
    10
    Correct
    Wrong
  • 2
    7
    Correct
    Wrong
  • 3
    9
    Correct
    Wrong
  • 4
    None of these
    Correct
    Wrong
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Answer : 1. "10"

Q:

If $$ {a\over 3}={b\over3}={c\over4}$$ then find the value of $$ {a+b+c\over c}$$.

930 0

  • 1
    $$ {5\over 8}$$
    Correct
    Wrong
  • 2
    $$ {5\over 2}$$
    Correct
    Wrong
  • 3
    $$ {5\over 7}$$
    Correct
    Wrong
  • 4
    $$ {9\over 8}$$
    Correct
    Wrong
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Answer : 2. "$$ {5\over 2}$$"

Q:

Adding 335 to 5A7 results in 8B2. The number 8B2 is divisible by 3. Accordingly, what will be the maximum possible value of A?

929 0

  • 1
    8
    Correct
    Wrong
  • 2
    4
    Correct
    Wrong
  • 3
    2
    Correct
    Wrong
  • 4
    6
    Correct
    Wrong
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Answer : 2. "4"

Q:

if a+b+c=7 and a3+b3+c3-3abc=175, then what is the value of (ab+bc+ca)?

929 0

  • 1
    8
    Correct
    Wrong
  • 2
    9
    Correct
    Wrong
  • 3
    7
    Correct
    Wrong
  • 4
    6
    Correct
    Wrong
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Answer : 1. "8"

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