Maths Practice Question and Answer

Q:

Ishita can read a newspaper in 'n' minutes. What part of the newspaper can she read in 7 minutes (n>7)

950 0

  • 1
    $${n\over7}$$
    Correct
    Wrong
  • 2
    $${7n^2}$$
    Correct
    Wrong
  • 3
    $${7n}$$
    Correct
    Wrong
  • 4
    $${7\over n}$$
    Correct
    Wrong
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Answer : 4. "$${7\over n}$$"

Q:

If 16 : X :: X: 196, find the positive value of x?

949 0

  • 1
    60
    Correct
    Wrong
  • 2
    62
    Correct
    Wrong
  • 3
    56
    Correct
    Wrong
  • 4
    64
    Correct
    Wrong
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Answer : 3. "56"

Q:

The lengths of the three sides of a right-angled triangle are (x - 1) cm, (x +1) cm and (x + 3) cm, respectively. The hypotenuse of the right-angled triangle (in cm) is:

949 0

  • 1
    6
    Correct
    Wrong
  • 2
    10
    Correct
    Wrong
  • 3
    12
    Correct
    Wrong
  • 4
    7
    Correct
    Wrong
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Answer : 2. "10"

Q:

The radius of a cone is 20 cm and height is 21 cm, the total surface area of the cone is in square cm:

948 0

  • 1
    3080
    Correct
    Wrong
  • 2
    3160
    Correct
    Wrong
  • 3
    2920
    Correct
    Wrong
  • 4
    3240
    Correct
    Wrong
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Answer : 1. "3080"
Explanation :

$$ {πr^2+πrl}$$


Q:

If p = 8.15, q = 9.06 and r = −17.21, then the value of p3+q3+r3-3pqr

948 0

  • 1
    -5.62
    Correct
    Wrong
  • 2
    4.75
    Correct
    Wrong
  • 3
    -3.81
    Correct
    Wrong
  • 4
    0
    Correct
    Wrong
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Answer : 4. "0 "

Q:

If 2sinθ+cosθ= $${7\over3}$$ then the value of (tan2θ-sec2θ) is

948 0

  • 1
    0
    Correct
    Wrong
  • 2
    -1
    Correct
    Wrong
  • 3
    $${3\over7}$$
    Correct
    Wrong
  • 4
    $${7\over3}$$
    Correct
    Wrong
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Answer : 2. "-1"

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